$\left(2m+n\right)\left(m+2n\right)$
$\frac{3x^3+2x^2+3x+7}{x^2+1}$
$sec^210=1\:-tan^210$
$\left(x^2\right)^{\frac{1}{3}}$
$\lim_{x\to3}x+4$
$x\left(3\right)+7x\left(2\right)+15x+9$
$\int4xe^{9x}dx$
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