Y add 8.51 add mul 0.8160000000000001 div tan add 9.38 mul -81.60000000000001 x_4 mul add mul -0.308 x_2 mul -3.5300000000000002 x_1 x_0 add mul -0.92 mul abs add 1.9100000000000001 mul -6.08 x_1 x_3 mul -5.38 x_2