Problem : Simplify -4x(11 + 6x - 12x2)

-44x - 24x2 +48x3

Problem : Simplify 7x2y(- 6x2 +2y2 + xy - 9x + 2)

-42x4y + 14x2y3 +7x3y2 -63x3y + 14x2y

Problem : Simplify (x + 9)(x + 6)

x2 + 15x + 54

Problem : Simplify (2x - 4)(x + 1)

2x2 - 2x - 4

Problem : Simplify (2x2 + 3x)(5x - 7)

10x3 + x2 - 21x

Problem : Simplify (- 3x3 +3)(- 4x2 - 6)

12x5 +18x3 -12x2 - 18

Problem : Simplify (x2 -4x + 7)(2x2 + 11x - 5)

2x4 +3x3 -35x2 + 97x - 35