$4x\:+\:5=3x+20$
$x\left(x^2\right)\left(x^4\right)$
$\frac{81m^2+1}{9m-1}$
$2\sec^2\left(30\right)-2\sin\left(30\right)$
$10x^2-20x-93=0$
$2\sin\left(14\right)\cos\left(14\right)$
$-7x^2-8$
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