What is the coefficient of x in (x^3 + x^2 + x + 1)(x^4 + 3x^3 + 4x^2 + 8x + 7)?
(x^3 + x^2 + x + 1)(x^4 + 3x^3 + 4x^2 + 8x + 7)
Note that "x" terms will only occur with multiplications of
x * 7 + 1 * 8x =
7x + 8x =
15x
+1756 
