$13\:-\:24\left(11\right)$
$\frac{x^2+11x-55}{x-5}$
$\left(\sin\left(2x\right)+\cos\left(6x\right)\right)^2$
$36+21c^2-132c$
$-465+365-594+235-562$
$-2n=-28$
$\left[\:\left(-28\right)\:-\left(+42\right)\:\:\:\:\:\:\:\:\:\:\right]-\left(-13\right)$
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