$\frac{2ba^7\cdot2b^4}{ba^2\cdot3a^3b^4}$
$y^2\:+\:11y\:-\:6y\:+\:y^2$
$\frac{b^2}{b^4}$
$\sin x=\frac{1}{3}$
$\left(3xy^2\:-\:5\right)^2$
$-3\left(-1\right)^4+2$
$22\cdot22$
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