$2^3\:.3^2\:\:\:3^3\:\:$
$12\sqrt{2}\cdot12$
$4-0.75$
$50a^3b-84a^4b^2+45a^3b-18a^3b$
$\frac{3}{2}+x\ge2$
$\frac{sin2x}{1-cos2x}=tanx$
$\left(100mn\right)\left(5mn\right)$
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