Algebriac terms

Across

2. (sub)
3. (fraction)
6. terms (combine)
7. (expression)
8. (Remove brackets)
10. (distrubutive property)
14. (equation)
16. (degree)

Down

1. (rational number)
4. (to the power)
5. (B e d ____)
9. (brackets)
11. (positive-negative)
12. (X)
13. (constant)
15. (term)