Y add -68.60000000000001 sub add mul -1.31 mul mul tan add -1.9000000000000001 mul 0.269 x_3 sub add mul 6.4 div div x_2 exp add -53.0 mul -0.281 x_5 x_7 mul -4.33 x_4 mul -0.47400000000000003 x_2 x_1 mul -0.84 x_0 mul -5.0 x_6