$0.167x^2+0.333x+0.444$
$-5ab+1.3ab-ab$
$\lim_{x\to25}\left(\frac{x^2-625}{\sqrt{x}-5}\right)$
$\csc^290$
$\frac{8}{4}+\frac{6}{3}+c$
$7p+15=5p-3$
$4r+-4=-12$
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