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Oblicz wartość liczbową wyrażenia:
a) (x² + 1) - (x² - x) + 10 dla x = 2,2
b) (a + 4b) - (5 + 2a) - (3b - 5) dla a = -0,1 i b = 0,2
c) (-a² + 2ab - 1) + (a² - 4ab + 5) dla a = 1/4 i b = 2

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