Y add -7.82 mul inv add -0.771 mul 0.218 x_1 add mul -0.006 x_4 mul -0.7010000000000001 div pow2 add 4.99 mul 0.43 x_2 sub mul 0.461 x_2 sub sub mul 0.063 x_0 mul -12.9 x_0 mul 0.514 div div x_3 x_1 x_0