$3n+5p+2+n$
$\lim_{x\to\infty}\left(\frac{1}{x^2+3}\right)$
$-x^2+2x=-14$
$9xy+y+x-5+3yx$
$\int_{-5}^5\sqrt{25+x^2}dx$
$\left(7m-3\right)\left(7\:m+3\right)$
$5\sqrt{x}^3$
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