Y add 21.5 div div x_8 sub mul 64.10000000000001 div div add mul -0.077 x_8 mul -6.3 div x_5 sub mul 15.600000000000001 mul x_0 x_7 mul -0.783 div x_3 inv add 85.10000000000001 mul 0.458 div x_2 x_6 x_6 x_7 mul -0.8140000000000001 x_1 x_4