You can put this solution on YOUR website! A handy thing to use is Pascals triangle
It looks like
1
1 - 2 - 1
1 - 3 - 3 - 1
1 - 4 - 6 - 4 - 1
1 - 5 - 10 - 10 - 5 - 1
The last line is the coefficients of the 6 terms of
For your problem say
Just keep following the pattern of Pascals triangle
for higher powers