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Using operators for syms

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Majid kh
Majid kh 2019-2-15
Hi dear, I execute this program:
syms S;
A=1/(S+1);
B=2/(S+3);
Result=A+B
but result is:
Result =
1/(S + 1) + 2/(S + 3)
How can i change result to become format like below?
Result =
(3*S)/( S^2+4*S+3)

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