$5\left(4-7\right)^2-4\left(4-8\right)^2$
$\frac{x+1}{2}-\frac{x-1}{2}$
$\left(3x+2\right)\:\:\:+\:\:\left(3x+2\right)+\:\:\left(3x+2\right)+\left(3x+2\right)+\:\:\left(3x-2\right)\:+\:\:\:\left(3x-2\right)\:\:$
$\int\frac{x}{\left(x^2-7\right)^2}dx$
$\lim_{x\to\infty}\left(\frac{x^{2}}{x^{2}-4}\right)$
$3^2+3^3$
$\frac{dn+1}{dt}=te^{t+2}$
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