k1 = -247/100
k2 = 1097/50
k3 = 641/100
k4 = 7/4
k5 = 4/5
k6 = 1/20
k7 = 693/1000
k8 = 1/500
k9 = 7/100
k10 = 1/5
k11 = 91/10
k12 = 1