Let A = x^4 + x^3 + x^2 + x + 1 and B = x^4 - x^3 + x^2 - x + 1. Simplify A + B.
(x^4 + x^3 + x^2 + x + 1) + (x^4 - x^3 + x^2 - x + 1)
2x4+2x2+1
+802 
+49 
