Question

pls how do i use mathmatical symbols in my queation

Answer 1

Use the equation editor (left most button)
type in latex commands

Answer 2

\[\int\limits\limits_{10}^{?}\]

Answer 3

You can also right click on a math formula if you want to see how it was created.
Here I removed the upper limit.
\[ \int\limits\limits_{10} \]

Also, if you want to embed math in a sentence like this. \( \pi \approx \) 3.14159 you use \( then close with \ )