$4x-\left|9-4\left(3-x\right)\right|$
$9x^4y^2+12x^2y+4x^2$
$16x+32y+2$
$7y+4y+5x$
$-\frac{169}{-13}$
$\frac{x}{\:8}=-3$
$4\cos\left(2x\right)+3\cos\left(x\right)+4$
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