double :: Int -> Int
-- testing 4 combinations of argument values
-- pruning with 14/25 rules
-- 3 candidates of size 1
-- 0 candidates of size 2
-- 3 candidates of size 3
-- tested 4 candidates
double x  =  x + x

triple :: Int -> Int
-- testing 4 combinations of argument values
-- pruning with 14/25 rules
-- 3 candidates of size 1
-- 0 candidates of size 2
-- 3 candidates of size 3
-- 0 candidates of size 4
-- 8 candidates of size 5
-- tested 7 candidates
triple x  =  x + (x + x)

add :: Int -> Int -> Int
-- testing 4 combinations of argument values
-- pruning with 14/25 rules
-- 4 candidates of size 1
-- 0 candidates of size 2
-- 8 candidates of size 3
-- tested 6 candidates
add x y  =  x + y

square :: Int -> Int
-- testing 3 combinations of argument values
-- pruning with 14/25 rules
-- 3 candidates of size 1
-- 0 candidates of size 2
-- 3 candidates of size 3
-- tested 6 candidates
square x  =  x * x

cube :: Int -> Int
-- testing 3 combinations of argument values
-- pruning with 14/25 rules
-- 3 candidates of size 1
-- 0 candidates of size 2
-- 3 candidates of size 3
-- 0 candidates of size 4
-- 8 candidates of size 5
-- tested 14 candidates
cube x  =  x * (x * x)

tnpo :: Int -> Int
-- testing 3 combinations of argument values
-- pruning with 14/25 rules
-- 3 candidates of size 1
-- 0 candidates of size 2
-- 3 candidates of size 3
-- 0 candidates of size 4
-- 8 candidates of size 5
-- 0 candidates of size 6
-- 27 candidates of size 7
-- tested 16 candidates
tnpo x  =  x + (x + (x + 1))