$m\:+\:2m\:+\:1$
$-\left(1\:-\:5x\right)$
$3x+5x^2-2-x+2x^2$
$a^2+3a-4$
$13^4$
$\left(7x^5+8x^4-3x\right)+\left(5x^4+2x^3+9x-1\right)$
$2\tan x+5=-4$
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