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You know: two and two makes something, four and four makes something; itīs different to the first ... (Stan Laurel in "A Champ At Oxford", 1939) |
2 + 2 = x 4 + 4 = y |
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Beweis von "" unter der Voraussetzung, dass "", "2 + 2 = x" und "4 + 4 = y" ist: |
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