$\frac{\sqrt[3]{a^5\cdot a\frac{1}{2}}}{a\frac{5}{2}}$
$x^2+9x+6x+54-x^2+3x+2x+6$
$36x^2^2^2^2+84x^2^2+49$
$\frac{w^3-21}{w-6}$
$\frac{\:2w}{w^2}$
$\frac{\sqrt{2}-\sqrt{2}}{2}$
$\frac{m^2-16}{m+4}$
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