Do you mean wrapping multiple figures underneath a square root symbol, for example?
Use {} brackets.
Code:
\sqrt{90 + 10}
x^{\frac{10}{5}}
(I'm not sure about the last one but yeahh ... Have a play around and report back if it works or not =] ... I'm not aware of latex working in the PF forums?)
The second one works but by figures I meant pictures (or images). I tried a package wrapfig which is made for this work only, but it works properly for one figure only; as soon as I put the second picture, the second picture becomes a float and runs away to last page.