$\int_1^7\left(\sqrt{-x^2+8x-7}\right)dx$
$\left(14x-12y\right)^2$
$\lim_{x\to4}\left(\frac{x^3+8x}{3x}\right)$
$-5\left(a-8\right)+4\left(a-b+11\right)$
$4n^2-n-2162$
$2x+3\left(x+3\right)$
$\frac{x^3+x^2+x-1}{x^2-4}$
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