Usuń nawiasy i wykonaj redukcję wyrazów podobnych.
(3/5m2 + 2/3n2 + 6) + (-1/3m2 - 2/3n2 - 2 3/5)
*n2- do potęgi drugiej
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3/5m2+2/3n2+6-1/3m2-2/3n2-23/5=9/15m2-5/15m2+2/3n2-2/3n2+30/5-13/5=4/15m2+17/5=4/15m2+3 2/5