Question 1088705
Question:
(1-x+x^2)^4
 
Solution:
It is not clear exactly what you require as an answer, whether you need the coefficient of a certain power of x, or something else.
Here's the complete expansion, hope you'd find the answer you need in the following:
(1-x+x^2)^4
= {{{x^8-4x^7+10x^6-16x^5+19x^4-16x^3+10x^2-4x+1}}}