text: # Why is $(1+2+3+4+…+n)^2$ equal to $1^3+2^3+3^3…+n^3$? [duplicate]
  
  I noticed that the sum of the first $n$ cubes is equal to the square of sum of the first $n$ natural numbers: $$\sum\limits_{i=1}^n i^3=\frac{n^2(n+1)^2}{4}=\left(\frac{n(n+1)}{2}\right)^2=\left(\sum\limits_{i=1}^n i\right)^2$$
  
  Is there a clever way to explain (not prove) this identity?