$+2-1-6+3-9$
$\frac{d}{dx}\left(\frac{3x^{\frac{2}{3}}}{2}\right)$
$\cos^2\left(a\right)=\sin\left(a\right)+1$
$\int\frac{2x-1}{\left(x^2+1\right)\left(x-1\right)^2}dx$
$100x^2+80xy+4y^2$
$4-10p+25p^2$
$y^2-10+15$
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