a comlex fraciton is a fraction with another fraction in either the denomenator or the numerator (yo dawg, I heard you like fractions...)
example
[tex]\frac{\frac{2}{3}}{\frac{6}{5}}[/tex] or
[tex]\frac{\frac{2}{3}}{6}[/tex] or
[tex]\frac{2}{\frac{6}{5}}[/tex]
