$\left(\frac{1}{2}a^2-3b\right)^2$
$3\:\left(2x\:+\:4\right)-\left(5x-2\right)$
$\cos\left(\arccos\left(x\right)\right)$
$z^{\frac{2}{3}}\cdot z^{\frac{1}{2}}$
$\left(3ab+5x^2\right)^2$
$2^2+4^2-5$
$\lim_{x\to1}\left(\frac{3-3^x}{2-2^x}\right)$
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