$\sqrt{12^2+5^2}$
$\int7\left(7x+28\right)^9dx$
$\left(2x+4z\right)y$
$\left(-5a^3b^4c^2\right)\left(-2a^2b^5\right)$
$9^{7-2x}=3^{x^2-9x-22}$
$\frac{dy}{dx}\left(x^2y=4a^2\left(2a-y\right)\right)$
$\int\:\frac{x^2+2x-3}{x^2}dx$
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