Check and verify a polynomial — task. Maths CBSE Live product, Class 9 (2026-27).

Which one of the following is a polynomial?

$\frac{t^{2}}{3} - \frac{3}{t^{2}}$
$\sqrt{2 t} - 5$
$t^{2} + \frac{5 t^{\frac{3}{2}}}{\sqrt{t}}$
$\frac{t - 3}{t + 3}$

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