$9x^2+3x^2+2^2$
$\left(4x^5\right)^2$
$66\cdot120-45\cdot2-7\cdot4+12\cdot5+3$
$x^2y^2+4xy+y^2$
$7\left(-2v+7\right)=-3v+16$
$\left(\sqrt{x}\right)^{32-2}$
$y=3cos\left(\frac{x}{4}-\frac{\pi}{2}\right)$
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