$-8+3\left(-7\right)+5$
$2a-2$
$\sqrt{4x^2}-9$
$\int_0^{100}-e^{-x}dx$
$\frac{25x^2+9}{x^2-25}$
$m^4-8m^2+4$
$100x^12-60x^6\:y^3+9y^6$
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