algebra
posted by kyla .
negative five divided by negative three minus two times negative one third minus twenty one divided by seven

Doesn't your computer have a numbers key? It's much easier to do math that way. You will need to use parentheses to clarify the order of operation.
(5/3)  2*(1/3)  (21/7)
= (5/3) +(2/3) 3 = ?
This is not an algebra question. You are just performing basic arithmetic operations.