State whether the given expression is a polynomial. If not give reason:

$\frac{1}{x}\left(x+5\right)$

State whether the given expression is a polynomial. If not give reason:

$\frac{1}{x^{-2}}+\frac{1}{x^{-1}}+7$

State whether the given expression is a polynomial. If not give reason:

$\sqrt{5}{x}^2+\sqrt{3}x+\sqrt{2}$

State whether the given expression is a polynomial. If not give reason:

$m^2-\sqrt[3]{m}+7m-10$

Write the coefficient of $x^2$ and $x$ in the given polynomial.

$4+\frac{2}{5}{x}^2-3x$

Write the coefficient of $x^2$ and $x$ in the given polynomial.

$6-2x^2+3x^3-\sqrt{7}x$

Write the coefficient of $x^2$ and $x$ in each of the following polynomial.

$\pi x^2-x+2$

Write the coefficient of $x^2$ and $x$ in the following polynomial.

$\sqrt{3}{x}^2+\sqrt{2}x+0.5$

Write the coefficient of $x^2$ and $x$ in the given polynomial.

$x^2-\frac{7}{2}x+8$