$8r+12p-7-3p$
$\frac{2}{5}x+5-\frac{1}{5}x+3$
$5tan^2x-5tanx$
$2m^2\:a\:cm^2$
$36t^2-16s^2$
$\left(x+4\right)\left(x+5\right)-6\ge6$
$\int-24x^{-7}dx$
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