$-2y\left(-2y\right)$
$\int_1^{\infty}\left(\frac{2}{x^3}\right)dx$
$2\cdot512$
$\int\:8\:cos\:\frac{x}{2}\:dx$
$5x\:-2=2x+13$
$\int_{-\pi}^{\pi}x\cdot\sin\left(4x\right)dx$
$\frac{x^2+7x+42}{x-3}$
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