Y add 4.47 div inv add sub mul 86.0 x_2 mul -61.7 x_3 mul 0.655 x_0 mul x_1 sub add mul -0.498 x_3 mul 0.554 x_6 mul -2.0 exp add mul -7.8100000000000005 x_4 sub mul -6.16 x_5 mul -47.300000000000004 x_7