$-x-2^2$
$x^5-2x^4-3x^2$
$-2-3x\ge2$
$\int_{-2}^23x\left(x-4\right)dx$
$x^2-1^2$
$\frac{2}{x+2}\:-\frac{5}{x+3}$
$7^{8\:}x\:7^4$
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