$4p\:+\:6q\:=\:20$
$+20^1$
$\frac{1-\tan^2x}{1-\tan^2x}=2\cos^2-1$
$2+2\cdot5$
$\left(0.2x^3+1.2\right)\left(0.2x^3-1.2\right)$
$2\left(3g-4\:\right)-\left(8g+3\right)$
$\frac{x^2+13x+38}{x+7}$
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