$4x+5>8x-7$
$x^{2\:}+6x=7$
$7x-21$
$54+31+7n^2-\:n^2$
$\sqrt[4]{z^{12}}$
$\int sin\left(-2x\right)cos\left(4x\right)dx$
$2b^2+5b^2+8$
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