$\sqrt{\infty^2+1}+\infty$
$\frac{7x^2-3x+1}{x+1}$
$7x+7+8-6x$
$\left(7ab\right)^3+343a^3$
$\lim\:_{x\to\:\:1}\left(\frac{x^2+x-2}{x-1}\right)$
$\left(8m+3\right)\left(8m-3\right)$
$4\cos\left(x\right)^2=3-4\sin\left(x\right)$
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