comb_1 asin
comb_2 cube
comb_3 acosh
comb_4 log
comb_5 atan
comb_6 square
comb_7 cos
comb_8 sin
comb_9 exp
comb_10 sqrt
comb_11 atanh
comb_13 tanh
comb_14 cubert
comb_15 lin
comb_16 acos
comb_17 tan
comb_18 asinh