$\lim_{x\to\pi}\left(\frac{x-\pi}{sin\left(x\right)}\right)$
$2\:+\:\sqrt{2x+1}\:=\:x$
$\frac{dy}{dx}-2y=30$
$30a^3by^3+40a^3by^3$
$\frac{2x-3}{5}+3=-2x$
$x^2\:-\:30x\:+\:225$
$\int\left(\frac{3}{t^5}\right)dt$
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