$81m^2+36m+4$
$\left(x^2\:y^8\:z^6\right)\left(xy^3\:z^2\:+\:3x^2\:z-5y^4z^2\right)$
$\lim_{x\to\infty}\left(\frac{x+x^3-7}{x^3+2x-1}\right)$
$\left|45-4\right|$
$-12+1+\left(-67\right)$
$\frac{1}{2}senxcosx\:+\:\frac{1}{16}sen\left(2x\right)cos\left(2x\right)$
$\lim_{x\to0}\left(\frac{\cos7x-\cos3x}{x^{2}}\right)$
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