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restrangeti sumele
2v3+5v3-(7v3+2v3)
11v7+7v7-(3v7-5v7)
2v5-4v5+(2v5+9v5-7v5)
v5+(-3v5+6v5)-(3v5-9v5)
2v6+3v3-(5v6-3v3)+(-3v6-9v3)
(-9v13+5v13)-(8v13-v13)+7v11