$x^4+5x^2-36$
$x^2+1>2x$
$\frac{1}{\sqrt[2]{\frac{1}{x^2}+\frac{1}{y^2}}}$
$e^{y^2}dx+x^2ydy=0$
$\left(b\:\cdot\:1\right)^2$
$\frac{a^{-2}}{b^{-3}}-\frac{b^3}{a^2}$
$\left(x^2-1\right)e^2$
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