1) (6x³+6x+6)-(2x³+2x-2)=(6x³-2x³)+(6x-2x)+(6+2)=4x³+4x+8
2) (3n²+2n+5)-(5n²-3n+7)=(3n²-5n²)+(2n+3n)+(5-7)=-2n²+5n-2
3) (3n³+4n-7)-(5n³+7+2)=(3n³-5n³)+4n+(-7-7-2)=-2n³+4n-16
(3n³+4n-7)-(5n³+7n+2)=(3n³-5n³)+(4n-7n)+(-7-2)=-2n³-3n-9
4) (3n²+11n-7)-(6n²-3n+8)=(3n²-6n²)+(11n+3n)+(-7-8)=-3n²+14n-15
5) (5x²-2x+4)-2x²+(7x-1-x²)=(5x²-2x²-x²)+(-2x+7x)+(4-1)=2x²+5x+3
1) (6x³+6x+6)-(2x³+2x-2)=(6x³-2x³)+(6x-2x)+(6+2)=4x³+4x+8
2) (3n²+2n+5)-(5n²-3n+7)=(3n²-5n²)+(2n+3n)+(5-7)=-2n²+5n-2
3) (3n³+4n-7)-(5n³+7+2)=(3n³-5n³)+4n+(-7-7-2)=-2n³+4n-16
(3n³+4n-7)-(5n³+7n+2)=(3n³-5n³)+(4n-7n)+(-7-2)=-2n³-3n-9
4) (3n²+11n-7)-(6n²-3n+8)=(3n²-6n²)+(11n+3n)+(-7-8)=-3n²+14n-15
5) (5x²-2x+4)-2x²+(7x-1-x²)=(5x²-2x²-x²)+(-2x+7x)+(4-1)=2x²+5x+3