$4^{-2}\cdot4^3$
$4a-3b-5b+2a+4b-6a-4b$
$\frac{144}{36}x^2-\frac{81}{9}y^2$
$\left(\frac{2}{3}m^3-\frac{1}{2}m^2-\frac{3}{5}m\right)^2$
$\frac{1}{2-x}<3$
$3x+y=46$
$\frac{4\sin\left(x\right)\cos\left(x\right)}{\cos^2\left(x\right)-\sin^2\left(x\right)}$
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