$\frac{x-1}{x+1}\le2$
$\left(12c-10d\right)^2$
$3x+3\le-1$
$y=x\:-\frac{4}{x}$
$\left(-2x^5y^2\right)^2$
$-7-\left(-8\right)-\left(-9\right)-3$
$exp\left(x\right)$
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