Y add 0.133 sub mul -3.86 x_0 sub mul 0.388 x_8 mul 7.4 mul x_0 mul sub mul -7.8100000000000005 x_4 add mul 0.5630000000000001 x_5 add mul -0.877 x_7 mul 68.8 mul sub mul -7.78 x_6 mul -35.9 x_3 x_2 x_1