$\left(1+8x\right)\:\left(1-8x\right)$
$\int xn^xdx$
$\left(x+y^{\left(2\right)}-5\right)\left(x-y^{\left(2\right)}+5\right)$
$-2e^{-\frac{a}{2}}+2e^{-\frac{0}{2}}$
$\int\frac{7x^3+8x}{x^2-x-2}dx$
$\lim_{x\to\infty}\left(\frac{3^x-1}{3^x+1}\right)$
$\frac{3x^2+2x-1}{x+2}$
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