What is the coefficient of x in (x^3 + x^2 + x + 1)(x^4 + 3x^3 + 4x^2 + 8x + 7)?
The 'x' coefficient willl come from the multiplication of the two polynomial factors : (1 * 8x) + (7 * x ) = 15x
so the coefficient of 'x' will be '15'
+430 
+37146 
