ACCEPTED SOLUTION
Accepted Solutions
Can't be sure as you don't attach your sheet, but it looks like you have an invisible implicit multiplication operator between "sec" and the parentheses. So your integrands are "sec^2*x" and "sec*x^2", where "sec" is treated as an unknown.
If you fix that it should work as expected:
You can't use the first notation. While its a quite common and useful shortcut its not perfectly correct to just square the function name and so Mathcad does not accept it. In fact you even should not be able to enter it that way. Its probably from your try to enter it anyway which resulted in separating the function name from the argument and created that implicit multiplication.
If you really need that kind of notation, you could define a custom function for the square of sec but its not that good looking.
LT
Can't be sure as you don't attach your sheet, but it looks like you have an invisible implicit multiplication operator between "sec" and the parentheses. So your integrands are "sec^2*x" and "sec*x^2", where "sec" is treated as an unknown.
If you fix that it should work as expected:
You can't use the first notation. While its a quite common and useful shortcut its not perfectly correct to just square the function name and so Mathcad does not accept it. In fact you even should not be able to enter it that way. Its probably from your try to enter it anyway which resulted in separating the function name from the argument and created that implicit multiplication.
If you really need that kind of notation, you could define a custom function for the square of sec but its not that good looking.
LT
You can't use the first notation.
Oh yes you can 
. It is a little documented (or undocumented?) feature of Mathcad. For certain trigonometric functions you can use the prefix operator with the function name squared in the first placeholder, and the variable in the second placeholder.
You don't even need the parentheses around the variable!
WTF, why can't I quote your message when I am in "Advanced mode
Because it's not allowed 
how can i switch back to "normal(?) mode"?
That's not allowed either 
And it really seems to work for just a few selected functions.
As far as I know, only certain trig functions. I think there are even some built-in trig functions for which it doesn't work, but I don't recall which ones.
