comb_0 tanh
comb_2 cube
comb_3 atan
comb_4 square
comb_5 cos
comb_6 sin
comb_7 exp
comb_8 acosh
comb_9 sqrt
comb_10 acos
comb_11 asin
comb_12 atanh
comb_13 asinh
comb_14 tan
comb_15 log
comb_16 cubert
comb_18 lin