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=x^2+2x+2x+4
=x^2+4x+4
b) 3(2x-1)^3
=3(8x^3-6x-1)
=24x^3-18x-3
c) 2(3p+q)^4
2(81p^4+12pq+q^4)
162p^4+24pq+2q^4
d) -3(-x-y)^3
-3(-x^3+3y-y^3)
3x^3-9y+3y^3