Question 631466
{{{-3a^3b(2a^0b^4-4a^2b^3)=-6a^(3+0)b^(1+4)+12a^(3+2)b^(1+3)=-6a^3b^5+12a^5b^4}}}
Answer: b. {{{12a^5b^4-6a^3b^5}}}