Evaluate $$\frac{1}{2}+\frac{1}{3}+\frac{2}{3}+\frac{1}{4}+\frac{2}{4}+\frac{3}{4}+\frac{1}{5}+\frac{2}{5}+\frac{3}{5}+\frac{4}{5}+\ldots +\frac{1}{60}+\frac{2}{60}+\ldots +\frac{59}{60}$$.     Answer:~\uline{~~~~~~~~~~}~ 
Overseas Competition->Knowledge Point->Calculation Modules