$\lim_{n\to5}\left(\frac{\sin\left(x\right)}{n+1}\right)$
$\int x^2\left(x^3+1\right)^{15}dx$
$4x^2+16x-84=0$
$9x^2+12x=4$
$m\sqrt{2}n\cdot\frac{1}{n}\:\sqrt{5}n$
$y=xy+y$
$5x-y=5$
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