Let W = F(x , y, z) = xy + yz + xz , where x(t) = 3 + sin(2t -4), y(t) = t2 and %3D dW z(t) = 3 - t. Find at t = 2 dt Enter an integer or a fully reduced fraction such as -2,0, 15 , 3/4, -7/9 , etc. No Spaces Please.

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