$a^2-22+121$
$11+3x>11$
$x^2x\frac{2}{5}$
$-65+x\:=8$
$n^2-4n+3$
$y\frac{dy}{dx}=\sqrt{xy^2+9x}$
$\frac{2x^2+x}{2x^2-1}$
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