$-y\:+8\:para\:y=7$
$-16-1$
$9\cdot x=-540$
$\lim_{x\to\infty}\left(\frac{n^3+n^2-6n^6}{n^3+n^8+10n^6}\right)$
$-sin^2x\left(-1-cot^2x\right)$
$a^6b^3+1$
$\int\frac{3x^2+1}{x^2+4\left(x^2-1\right)}dx$
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