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