SubArea: Polynomials and fractionsLevel: AProject ID: 2010008806Source Problem: 2010008805Accepted: 0Clonable: 1Easy: 0Simplify: \[a^2(3a - b) -[b^2(a + 3b) -b(3b^2 + ab - a^2) - 3a^3]\]\(2a^2(3a - b)\)\(-2b^2(a + 3b)\)\(2(3a^3 - 3b^3 - ab^2)\)\(6(a^3 - b^3)\)
