c1 = 0.363445176,	c2 = 0.988622465,	c3 = 4.777144035
c4 = −0.114037667,	c5 = −8.50208 × 10−4,	c6 = −2.0716198 × 10−2
c7 = 6.87678 × 10−4,	c8 = 2.74954 × 10−4,	c9 = 0