$\frac{1}{2}\cdot\left(128-84\right)+128-84-\frac{1}{2}\cdot\left(128-84\right)^2$
$\lim_{x\to\infty}\left(\frac{11x}{11x+6}\right)^{4x}$
$f\left(x\right)=\frac{x}{x^2+5x+6}$
$4x^2-16x-36$
$\frac{1}{4}p^2\:+\:\frac{2}{5}pq\:+\:\frac{4}{25}q^2$
$\left(2p-10\right)\left(2p-7\right)$
$4\left(-a+b\right)+2c$
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