$( 3 x + 6 ) ( 2 x + 4 )$
$\int e^{x^2-4x}\left(x-2\right)dx$
$49a^4b^2\:-\:28a^4b^3\:\:-\:14a^2b^4$
$3\left(7\right)^4\:-\:3\left(7\right)^3\:-\left(7\right)^2\:+\:3\left(7\right)\:-\:1\:$
$2x+-2+3x+-1x$
$\left(y^4\cdot2y^3\right)$
$x^2\:+\:5x\:+6$
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