Ответ:

1)

[tex]y = 24 x {}^{5} - 8x {} ^{3} + 6x[/tex]

2)

[tex]y = 2 x {}^{7} + \frac{ 3 }{ \sqrt{x} } - 7[/tex]

3)

[tex]y = \frac{3 - 6x {}^{2} }{x {}^{4} } [/tex]