$45r^3-10r^3$
$\frac{dy}{dt}\:2y+1$
$4x^2+12x+2^2$
$\frac{dy}{dx}=\left(\frac{1}{x^2}\right)y-xy$
$3^{10}\cdot2^{11}\cdot5^9$
$4979+1$
$686,14\:+\:724,675\:+\:135$
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