$\frac{\left(am^2-am-2a\right)}{\left(am+a\right)}$
$1-25g^2$
$\int\frac{1}{5}x^5lnx\:dx$
$9,8\cdot80$
$\left(3x+y-z\right)^2$
$\left(-3m^7\right)\left(2n^{11}\right)^2$
$\frac{dy}{dx}=\frac{2x}{\sqrt{2x^2-1}}$
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