09 :: `+`(`*`(2, `*`(`^`(9, `+`(`*`(`^`(x, 2)), `-`(`*`(4, `*`(x))), 1)))), `*`(42, `*`(`^`(6, `+`(`*`(`^`(x, 2)), `-`(`*`(4, `*`(x))))))), `-`(`*`(15, `*`(`^`(4, `+`(`*`(`^`(x, 2)), `-`(`*`(4, `*`(x))), 1)...     :: [−1;3] 

 

 

 

 

:: `+`(2, `&+-`(sqrt(2))) ::  `+`(2, `-`(sqrt(2)))