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40 * 40 = 1600
17 * 17 = 289
44 * 44 = 1936
25 * 25 = 625
⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻
44²-25²
podnosisz wszytsko do 2 pokolei
odejmujesz do siebie
1600-289
₋₋₋₋₋₋₋₋₋₋₋
1936-625
dzielisz
1311/1311=1