-1------------------------------------

Interface: calc
Operation: add
Param #1 x
Param #2 y
Param #3 z
Operation: sub
Param #1 x
Param #2 y
Param #3 z

Interface: simple_calc

-2------------------------------------

Interface: calc
Operation: sub
Param #1 x
Param #2 y
Param #3 z

Interface: simple_calc
Operation: add
Param #1 x
Param #2 y
Param #3 z

-3------------------------------------

Interface: calc

Interface: simple_calc
Operation: add
Param #1 x
Param #2 y
Param #3 z

-4------------------------------------

Interface: calc

