1. 3x+10x
2. 3x·10x
3. 6x^2-30x^2
4. 6x^2·(-30x^2)
5. -6z^2-30z^2
6. -6z^2·(-30z^2)
7. 10y-12y
8. 10y·(-12y)
9. 4y/2y
10. 6x^2/3x
1.13x 2.30x^2 3.-24x^2 4.-180x^4 5.-36z^2 6.180z^4 7.-2y 8.-120y^2 9.2 10.2x