$\left(-x+5\right)\cdot\left(-9x-54+\frac{270}{-x+5}\right)$
$\frac{z}{14}+14=24$
$\int\left(\frac{1}{2}tsin4t^2\right)dt$
$49x^2-14xy+y^2$
$\sqrt{tan\left(x\right)^2+cot\left(x\right)^2}$
$2\cdot x^2\cdot y-3\cdot y^2+6\cdot y$
$6x^2+5\:x+1$
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