$2\cdot5^{x-4}+15=265$
$\left(j+4\right)\left(j-11\right)$
$x^3+4xy+y;\:x=3;\:y=-2$
$2ab^2+a^2b$
$rs+4st$
$\lim_{x\to0}\left(5+x^2\right)$
$\frac{x^2-28}{x-2}$
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