$-5r+\:8r\:+\:5$
$\frac{7}{\cos\left(45\right)}$
$-y-6-3y-y$
$\lim_{x\to11}\left(\frac{\left(x^2-121\right)}{\sqrt{x+5}-4}\right)$
$3x-5y-20=0$
$3=2xy-x$
$v^2+4v+100$
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