Y add 66.0 sub mul -9.56 x_0 sub mul 3.8000000000000003 x_1 add sub sub mul -0.605 x_3 mul 0.262 x_2 mul -4.99 exp add 5.47 mul -97.30000000000001 x_2 mul -6.7 mul x_0 sub mul -8.870000000000001 x_2 mul -5.49 x_0