$11+\left(-16\right)+\left(-40\right)-\left(-19\right)$
$f\left(x\right)=x^2-30x+225$
$-x^2-3x+12$
$\lim_{x\to\infty}2^{-x}$
$\sqrt{2x-3}\:+x=-3$
$\left(n-4\right)\left(n-2\right)$
$\int\sin^3\left(\frac{x}{2}\right)dx$
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