$\left(n+11\right)\left(n-11\right)$
$2x+1>-4$
$20=14+c$
$-x^4+2x^4$
$\frac{d^2}{dx^2}\left(x^2e^{x^2}\right)$
$\int\left(\frac{y^2-1}{y\left(y^2+1\right)}\right)dy$
$-1-\left(3-2\right)-\left(-4-5\right)$
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