$\int_{\frac{\pi}{2}}^x\left(-x\cos x\right)dx$
$\frac{x^2-x}{x\left(x+4\right)^3}$
$\left(w^4\right)^3$
$4x^2-4x+2$
$\int\sqrt{\sin8x^2}\cos8x^2x\:dx$
$\frac{-1}{\frac{1}{2}}$
$+4-\left(-3\right)$
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