Which of the following is a polynomial function?
a.
[tex] f(x)= 2 {x}^{2} - 10 {x} + 7[/tex]
b.
[tex]g(x) = 4 |{x}^{2} - 3x + 8| [/tex]
c.
[tex]p(x) = | |x3 - 7| | [/tex]
d.
[tex]s(x) = 2 {}^{m} - 1[/tex]

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