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# Interpreting notations

Some expressions can be written in different ways. The most common equivalent notations are listed here.

Operation Expression Example Equivalent Example
Product $\Tblue{a}\Tred{b}$ $\Tblue{2}\cdot\Tred{3}$ $\Tblue{a}\times\Tred{b}$ $\Tblue{2}\times\Tred{3}$
Ratio $\Tblue{a}/\Tred{b}$ $\Tblue{2}/\Tred{3}$ $\Tblue{a}\div\Tred{b}$ $\Tblue{2}\div\Tred{3}$
Ratio $\displaystyle\frac{\Tblue{a}}{\Tred{b}}$ $\displaystyle\frac{\Tblue{2}}{\Tred{3}}$ $\Tblue{a}\div\Tred{b}$ $\Tblue{2}\div\Tred{3}$
Square $\Tblue{a}^2$ $\Tblue{2}^2$ $\Tblue{a}\times \Tblue{a}$ $\Tblue{2}\times \Tblue{2}$

For the product $\Tblue{a}\Tred{b}$, note the $\cdot$ used to distinguish between $\Tblue{2}\cdot\Tred{3} = 6$ and the number $23$ (twenty-three).