$\int7abc\:dz$
$5a^4-3a^2-a^4-4a^2$
$36x^2-24x-16$
$-x>5$
$\int_{-\infty}^{-2}\left(\frac{1}{x^2}sin\frac{\pi}{2}\right)dx$
$\int\:\frac{\left(4x+7\right)}{\left(2x^2+7x\right)^6}\:dx$
$x^3+8x^2-20x$
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