$\sqrt{x+2-3}$
$\frac{-\frac{3}{4}a^3b^2}{\frac{2}{3}a}+\frac{\frac{2}{5}a^4b^3}{\frac{2}{3}a}+\frac{-\frac{3}{5}a}{\frac{2}{3}a}$
$5+3\cdot2^3$
$x2-3x+73$
$-20x^2+100x-40$
$\frac{8^{-21}}{8}$
$169-196z^4$
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