$y^2+2y$
$\frac{x^3-66}{x+4}$
$\frac{4}{5\left(1-x\right)^2}$
$\left(5m^4-3m^2n^2+n^4\right)x\left(3m-n\right)$
$59-x=11$
$-3x+\frac{1}{2}\le4$
$tx-4=-8$
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