(2x-5)(3x+2)(x+7) - Expand the brackets.
(6x^2+4x-15x-10)(x+7)(6x^2 -11x-10)(x+7)= 6x^3-11x^2-10x+42x^2-77x-70)=6x^3+31x^2-87x-70
GA
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How do you expand brackets?