$\int x^2e^{-14x}dx$
$\lim_{x\to-1.570796327}\left(\frac{sin\left(x+\frac{\pi}{2}\right)}{cos\left(x\right)}\right)$
$\int\left(18x\left(3x^2-1\right)^3\right)dx$
$-ab+b^2+ab-c^2=0$
$\left(2x+3x^2\right)^3$
$b\left(a+5-c\right)$
$\left(w-2x\right)^2$
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