ss22 = -1. _d 0
ivec(1) = ss22 - ss11
ivec(2) =(ss22 ** 2
ivec(3) =(ss22 ** 3
intF = intF / (ss22 - ss11)
_RL ss11,ss22
ss22 = +1. _d 0
ivec(4) =(ss22 ** 4
ivec(5) =(ss22 ** 5