Y add -1.3900000000000001 div div add mul -7.05 x_0 mul 92.30000000000001 mul x_3 x_6 sub mul 77.5 x_1 sub sub mul -0.484 x_5 sub mul 35.300000000000004 div exp add -0.582 mul -8.5 x_7 x_4 mul 0.498 x_2 mul -0.859 x_3 x_7