$\frac{tan\left(x\right)+c}{sec\left(x\right)}$
$4e\:+\:4e$
$6ab-7ab+3a+1b$
$0\::\:-4$
$xm^3+xy+m^3-y$
$\left(\sqrt{p}-\sqrt{7}\right)^2$
$-5r+\:8r\:+\:5$
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