07 À :: `+`(`^`(7, `+`(`*`(`^`(x, 2)), `-`(`*`(2, `*`(x))))), `^`(7, `+`(`*`(`^`(x, 2)), `-`(`*`(2, `*`(x))), `-`(1)))) = 56                                 Á :: [−1;1] 

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ÎÒÂÅÒ 

À :: `+`(1, `&+-`(sqrt(3))) Á :: `+`(1, `-`(sqrt(3)))