$\int x^{3}\sqrt{x^{2}-2}dx$
$n^2-4n+4$
$\left(9b^2-40b^2\right)$
$\left(3x+2y\right)^2v$
$-4+-\infty$
$\left(n+x\right)^2-\left(n-x\right)^2$
$\left(d+4\right)\left(d-3\right)$
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