comb_0  cube
comb_1  cosh
comb_2  cubert
comb_3  log
comb_4  cos
comb_5  sqrt
comb_6  exp
comb_7  acosh
comb_8  asinh
comb_9  lin
comb_10 atan
comb_11 acos
comb_12 sinh
comb_13 sin
comb_14 square
comb_15 atanh
comb_16 tan
comb_17 tanh
comb_18 asin