Question 172919
(x - 4) (2x^2 + 4) + (x + 4)(x^3 - 1) - (x^2 - x - 1)
First you have do multiplication using distributive property (a+b)(c+d)=ac+ad+bc+bd
(x*2x^2+x*4-4*2x^2-4*4) + (x*x^3+x*(-1)+4*x^3+4*(-1))-(x^2-x-1)=   remove brackets and remember to change sign if there is - before (...)
2x^3+4x-8x^2-16+x^4-x+4x^3-4-x^2+x+1=   add like items
x^4+6x^3-9x^2+4x-19