Question 6086
Remember to multiply by the term F-O-I-L (First terms, Outer terms, Inner terms, Last terms):

1. {{{x^2+3x+2x+6 = x^2+5x+6}}}
2. {{{6x^2+4x-15x-10=6x^2-11x-10}}}
3. {{{2x^3-2x^2-4x+5x^2-5x-10=2x^3+3x^2-9x-10}}}