# How to expand until no more braces exist?

My input is as follows

I don't want (t u - b C p) to exist. How to expand until no more braces exist?

• It would be very helpful if you could post actual code instead of an image, makes testing a lot easier ;-) – Lukas Lang Aug 25 '17 at 19:01
• Are you able to provide code, instead of an image? That way I can easily try this in my instance of Mathematica without having to retype it. – ktm Aug 25 '17 at 19:08
• How so? It shouldn't ever be necessary for questions like this. – ktm Aug 25 '17 at 19:11
• what are the variables here? is rpt a variable, or is it r*p*t? It is not clear from the picture. t,u,b,p all look defined (they're black, not blue), and it is probably frowned upon to use C as it is a system symbol. – ktm Aug 25 '17 at 19:15
• Why do the blue and black coloring disagree? I can't reproduce your output by manually typing this myself. – ktm Aug 25 '17 at 19:16

I am going to guess there is some very weird hidden formatting going on that isn't visible to the naked eye, and that it is interpreting (t u - b C p) as a single symbol, not as a subtraction within parenthesis to be distributed. My guess it that it was copy and pasted from somewhere and Mathematica didn't interpret that original form properly.
ExpandAll[(((C + b*h)*r*p*t)/Sin[A])*(t*u - b*C*p)]

As a side note, I'd avoid using C as a symbol, as it is a defined function(ish) in the language. See this reference page.