Run this simple formula ,input z in the 3 d map Spaces below, click outside the figure to look at the picture of mathcad is automatically closed ,i do not know why ,is everyone same to me??
Mathcad doesn't close for me. However, your problem is probably related to the fact that in the numerator of your atan argument you have x(y+1) with no explicit multiplication sign between the x and the y+1, so Mathcad thinks it's a function. Insert a multiply immediately after the x.
Alan
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