Color option in Context Panel does not work

Steps to Reproduce:
1. Create or open a histogram.
2. Try to change its color using the Color option in the Context Panel.
3. Observe that the color does not change.
4. Click outside the histogram.
5. Click back on the histogram.
6. Try the Color option again — now it works.

Expected Behavior:  
The Color option should work immediately when applied to the histogram, without requiring extra clicks.

Actual Behavior:  
The Color option only works after clicking outside the histogram and then reselecting it.

Derive simplifies directly to (1 - a)^3 .

Hi everyone,

I'm trying to simplify

sqrt(sqrt(12)/(9 + sqrt(108)))

into

1-sqrt(3)/3

using Maple. Could someone please show me the Maple commands or step-by-step procedure that would do the simplification for me?

Thanks in advance for your help!

Why can't Maple compare two identical matrices or vectors?