Align superscript part after subscript part in equation

Question

I would like to produce this in Microsoft Word using the equation tool:

However, entering c_rms [space] ^2 [space] produces this output instead:

How can I create an equation where the ^2 comes after the _rms, rather than being above it?

Answer 1

You'd need to enclose the variable in parentheses:

(c_rms)^2