Simplifying
$x-7>-1$
$\int x\infty e^{-2x}dx$
$2-2\cdot4+5\cdot4$
$\int x^2\cdot e^{-\frac{1}{2}x}dx$
$\frac{1}{2}sin2\pi x\:+\:\frac{1}{4}\:sin4\pi x=sin2\pi x\:cos^2x$
$\lim_{x\to0\:}\left(ln\left(cosx\right)\right)^2$
$533+528$
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