$\left(-36\right)-\left(-70\right)-\left(11\right)$
$\frac{x^3-5x^2-4x+2}{x+1}$
$sec\left(3x\right)cos\left(3x\right)$
$\lim_{x\to0}\left(x+e^{3x}\right)^{\frac{2}{x}}$
$n+4-n-2^2$
$\frac{\left(a+2\right)}{4}+\frac{a}{5}=5$
$-6\left(-8\right)\left(-2\right)$
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