Question

please answer this my topic is all about sums and differences of rational algebraic expression perform the indicated operation reduce answer to lowest term 3/5 + 4/5 another is x/3 - y/3 another is 7/a + 2/a please answer it thanks!!!!!
3/5+4/5=7/5=1 2/5
x/3-y/3=x-y/3
7/a+2/a=9/a

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