$35m+50-11m+7$
$\int_2^3\left(\frac{x^2-9}{x^3-27x-9}\right)dx$
$2x+3=x-9$
$\frac{dy}{dx}=\frac{\left(-2xy-x\right)}{e^{x^2}}$
$4x^2y^4z+5xy^7z^4$
$2x^2-30=0$
$13-5\cdot9+8$
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