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MathML Test : maction

• toggle (clicking on combination must change the selected notation) : $\left(\genfrac{}{}{0ex}{}{n}{k}\right)C_n^k{C}_k^n{}_{n}C^k=\frac{\prod _{i=0}^{k-1}\left(n-i\right)}{k!}$
• statusline (clicking or moving the mouse on combination must display a message in the statusline) : $C_n^k\text{french notation for combination}$
• statusline (when mouse pauses over the expression for a long enough delay time a "tooltip" box must appear) : $C_n^k\text{french notation for combination}$
• statusline (moving the mouse on the expression may highlight it) : $C_n^k$