$4\left[\left(x+8\right)^2-\left(x+8\right)^2-20\right]=800$
$\left(m+y\right)^2$
$7^n\cdot\left(n+2\right)\cdot x^n$
$4x^2+168x-540=0$
$\lim_{x\to-3}\left(\frac{x^2\:-9}{3+x}\right)$
$42+\:42\:+\:42+\:64\:+\:64\:+64+\:64$
$5and-15$
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