$\lim_{n\to1}\left(-\frac{8}{n}\right)$
$x+5=3x-1$
$\lim_{x\to0}\left(\frac{-x+sin\left(x\right)}{x\cdot sin\left(x\right)}\right)$
$2x-5x+2y-x+y$
$2x+5+10x+9$
$3-2x=-x^2$
$2\cdot2a^2+3b^2$
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