hello, i was trying to simplify a trigonometric expression and it didn’t 
work, can you help me please? my computer uses the last IOS version


A=cos(x)^5+sin(x)^4+2*cos(x)^2-2*sin(x)^2-cos(2*x)
A.simplify_full()
       

Traceback (click to the left of this block for traceback)
...
RuntimeError: ECL says: The function SET-LOCALE-SUBDIR is undefined.

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