$x^4-10x^2+1$
$8-\left[-1-2-\left(-3+4\right)-2\right]$
$21ab+10ab^2-101a^2$
$\int ln\left(1+\sqrt{x}\right)dx$
$\left(\frac{dy}{dx}\right)-\left(\frac{1}{1+e^x}\left(y\right)\right)+e^xy=0$
$\left(-1\right)^n\left(\frac{n^2}{2n^3+1}\right)$
$-\frac{6xy}{3xy^2}$
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