$x-2\:\cdot3x$
$7x-2\ge3x-14$
$\frac{d^2}{dx^2}\left(x^4+2y^2=2\right)$
$\left(2y^2+2xy^2\right)\left(2xy+3\right)$
$\left(6f-1\right)^2$
$\tan\left(x\right)+\sec\left(x\right)=\left(\sin\left(x\right)+1\right)\sec\left(x\right)$
$\left(x^4+x^2+2x+2\right)\:x+1$
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