$3m+2=3+2m$
$\int\tan\:t\sec^4tdt$
$\left(\frac{2}{3}xy^2z^3-\frac{2}{3}y^4\right)^2$
$x+4-5x-2$
$5k\:+\:10\:=\:2\:+\:k$
$-2x^2+8x-9+4x+7x^2+2$
$\int^44x^3dx$
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