$\left(4x^{5}+2x^{4}-5x^{3}\right)-\left(3x^{5}+3x^{2}-5x\right)$
$-8\:\cdot\:5x$
$\left(5a+2ab\right)^2$
$\left(-5+3\right)^2+\left(1+3\right)^2$
$\lim_{x\to0}\left(3xtan\left(\left(\frac{\pi\:}{2}\right)-x\right)\right)$
$\left(-3\right)+\left(-9\right)\cdot\left(-2\right)+\left(-15\right)$
$14-16+8+12+8+6$
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