Y add -67.7 div x_3 mul sub mul 0.991 mul x_4 sub mul -31.5 x_1 mul 48.6 x_2 sub mul 6.3100000000000005 x_0 sub mul -28.1 cos add -66.10000000000001 mul 64.7 x_1 mul 39.800000000000004 mul x_4 x_0 x_1