(3*y/3) do kwadratu
(3y:3) do kwadratu
9y:9=y
(3*y/3) do kwadratu = 9y²/9 = y²
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(3y:3) do kwadratu
9y:9=y
(3*y/3) do kwadratu = 9y²/9 = y²