$250+190+425$
$\left(4\cdot10^3\right)\left(9\cdot10^8\right)$
$\left(3m+n\right)\left(3m-n\right)+\left(m-6\right)^2$
$-3y^2+1-y^2$
$9ar^2s^3-15br^2s^3$
$\int7x^5e^{-7x}dx$
$\tan\left(x\right)\frac{dy}{dx}+y=1$
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