$\lim_{x\to\infty}\frac{1}{x^2-4}$
$\left(9a+a\right)\left(7a+b\right)$
$\int-5dx$
$\left(6w\right)\left(6w\right)^4$
$\lim_{x\to-2}\left(\frac{\:\left(x^3+8\right)}{\left(x+2\right)}\right)$
$csc\:x\:-\:sin\:x\:=\:cos\:\left(-x\right)\:cot\:x\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:$
$\lim_{x\to-2}\left(\frac{x-3}{x+2}\right)$
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