$4x\left(2+3x\right)-4+3x$
$\left(+4\right)\:x\:\left(+15\right)\:x\:\left(+3\right)$
$y=-2\sin\frac{\pi}{2}\left(x+1\right)$
$\log_{12}\left(w\right)-\log_{12}\left(4\right)=2$
$2x-8>3x+2$
$\sin\left(b\right)\tan\left(b\right)$
$4xy\:-\:4xz\:+\:7xy\:-\:11yz\:$
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