diff --git a/arvo/test.hoon b/arvo/test.hoon
index b81e36679..ab7bd592d 100644
--- a/arvo/test.hoon
+++ b/arvo/test.hoon
@@ -1,165 +1,24 @@
-!:::::  ::::::::::::::::::::::::::::::::::::::::::::::::::::::
-::::::  ::::::    Preface                               ::::::
-::::::  ::::::::::::::::::::::::::::::::::::::::::::::::::::::
-?>  ?=(@ .)                                             ::  atom subject
-%.  .                                                   ::  fun with subject
-|=  cud=@                                               ::  call it cud
-=-  (mul:all 2 cud)                                     ::  multiply by 2
-^=  all                                                 ::  assemble engine
-  =~                                                    ::  volume stack
-%164                                                    ::  version constant
-::::::  ::::::::::::::::::::::::::::::::::::::::::::::::::::::
-::::::  ::::::    volume 0, version stub                ::::::
-::::::  ::::::::::::::::::::::::::::::::::::::::::::::::::::::
-~%  %k.164  ~  ~                                        ::
-|%                                                      ::
-++  stub  164                                           ::  version stub
---                                                      ::
-::::::  ::::::::::::::::::::::::::::::::::::::::::::::::::::::
-::::::  ::::::    volume 1, Hoon models                 ::::::
-::::::  ::::::::::::::::::::::::::::::::::::::::::::::::::::::
-~%    %mood
-    +
-  ~
-|%                                                      ::
-++  axis  ,@                                            ::  tree address
---                                                      ::
-::::::  ::::::::::::::::::::::::::::::::::::::::::::::::::::::
-::::::  ::::::    volume 2, Hoon libraries and compiler ::::::
-::::::  ::::::::::::::::::::::::::::::::::::::::::::::::::::::
-~%    %hoon
-    +
-  ==
-    %dec   dec
-  ==
+?>  ?=([@ @] .)
+%.  .
+|=  [x=@ y=@]
+=-  (add:all x y)
+^=  all
+=>  %164
+~%  %k164  ~  ~ 
 |%
-  :::::::::::::::::::::::::::::::::::::::::::::::::::::   ::
-::::              chapter 2a, basic unsigned math       ::::
-::  ::::::::::::::::::::::::::::::::::::::::::::::::::::::
-++  add                                                 ::  add
+++  add
   ~/  %add
   |=  [a=@ b=@]
   ^-  @
-  ?:  =(0 a)
-    b
+  ?:  =(0 a)  b
   $(a (dec a), b +(b))
 ::
-++  cap                                                 ::  tree head
-  ~/  %cap
-  |=  a=@
-  ^-  ?(%2 %3)
-  ?-  a
-    %2        %2
-    %3        %3
-    ?(%0 %1)  !!
-    *         $(a (div a 2))
-  ==
-::
-++  dec                                                 ::  decrement
+++  dec
   ~/  %dec
   |=  a=@
   ?<  =(0 a)
   =+  b=0
   |-  ^-  @
-  ?:  =(a +(b))
-    b
+  ?:  =(a +(b))  b
   $(b +(b))
-::
-++  div                                                 ::  divide
-  ~/  %div
-  |=  [a=@ b=@]
-  ^-  @
-  ?<  =(0 b)
-  =+  c=0
-  |-
-  ?:  (lth a b)
-    c
-  $(a (sub a b), c +(c))
-::
-++  gte                                                 ::  greater-equal
-  ~/  %gte
-  |=  [a=@ b=@]
-  ^-  ?
-  !(lth a b)
-::
-++  gth                                                 ::  greater-than
-  ~/  %gth
-  |=  [a=@ b=@]
-  ^-  ?
-  !(lte a b)
-::
-++  lte                                                 ::  less-equal
-  ~/  %lte
-  |=  [a=@ b=@]
-  |(=(a b) (lth a b))
-::
-++  lth                                                 ::  less-than
-  ~/  %lth
-  |=  [a=@ b=@]
-  ^-  ?
-  &(!=(a b) |-(|(=(0 a) &(!=(0 b) $(a (dec a), b (dec b))))))
-::
-++  mas                                                 ::  tree body
-  ~/  %mas
-  |=  a=@
-  ^-  @
-  ?-  a
-    1   !!
-    2   1
-    3   1
-    *   (add (mod a 2) (mul $(a (div a 2)) 2))
-  ==
-::
-++  max                                                 ::  maximum
-  ~/  %max
-  |=  [a=@ b=@]
-  ^-  @
-  ?:  (gth a b)
-    a
-  b
-::
-++  min                                                 ::  minimum
-  ~/  %min
-  |=  [a=@ b=@]
-  ^-  @
-  ?:  (lth a b)
-    a
-  b
-::
-++  mod                                                 ::  remainder
-  ~/  %mod
-  |=  [a=@ b=@]
-  ^-  @
-  ?<  =(0 b)
-  (sub a (mul b (div a b)))
-::
-++  mul                                                 ::  multiply
-  ~/  %mul
-  |=  [a=@ b=@]
-  ^-  @
-  =+  c=0
-  |-
-  ?:  =(0 a)
-    c
-  $(a (dec a), c (add b c))
-::
-++  peg                                                 ::  tree connect
-  ~/  %peg
-  |=  [a=@ b=@]
-  ^-  @
-  ?-  b
-    1   a
-    2   (mul a 2)
-    3   +((mul a 2))
-    *   (add (mod b 2) (mul $(b (div b 2)) 2))
-  ==
-::
-++  sub                                                 ::  subtract
-  ~/  %sub
-  |=  [a=@ b=@]
-  ^-  @
-  ?:  =(0 b)
-    a
-  $(a (dec a), b (dec b))
 --
-.  ==
diff --git a/main/bin/easy0.hoon b/main/bin/easy0.hoon
deleted file mode 100644
index ed7ef4cac..000000000
--- a/main/bin/easy0.hoon
+++ /dev/null
@@ -1,27 +0,0 @@
-!:
-::  /=main=/bin/solid/hoon
-::
-=>  .(- `[who=@p how=path]`-)
-|=  [est=time eny=@uw]
-|=  arg=~
-=+  ^=  cor
-    =<  |=  [x=@ y=@]
-        (add x y)
-    =>  %164
-    |%
-    ++  add   
-      |=  [a=@ b=@]
-      ^-  @
-      ?:  =(0 a)  b
-      $(a (dec a), b +(b))
-    ::
-    ++  dec
-      |=  a=@
-      ?<  =(0 a)
-      =+  b=0
-      |-  ^-  @
-      ?:  =(a +(b))  b
-      $(b +(b))
-    --
-:_  ~  :_  ~
-[%xx %sage [%easy0 %pill ~] cor]
diff --git a/main/bin/easy1.hoon b/main/bin/easy1.hoon
deleted file mode 100644
index 3f08eb7b2..000000000
--- a/main/bin/easy1.hoon
+++ /dev/null
@@ -1,31 +0,0 @@
-!:
-::  /=main=/bin/solid/hoon
-::
-=>  .(- `[who=@p how=path]`-)
-|=  [est=time eny=@uw]
-|=  arg=~
-=+  ^=  cor
-    =<  |=  [x=@ y=@]
-        (add x y)
-    =>  %164
-    ~%  %k164  ~  ~
-    |%
-    ++  add   
-      ~/  %add
-      |=  [a=@ b=@]
-      ^-  @
-      ?:  =(0 a)  b
-      $(a (dec a), b +(b))
-    ::
-    ++  dec
-      ~/  %dec
-      |=  a=@
-      ~|  %decrement-underflow
-      ?<  =(0 a)
-      =+  b=0
-      |-  ^-  @
-      ?:  =(a +(b))  b
-      $(b +(b))
-    --
-:_  ~  :_  ~
-[%xx %sage [%easy1 %pill ~] cor]