Write the coefficient of $x^{2}$ in the following polynomial:
$3x^{3} - 8x^{2} + 14x - 5$

What are the possible expressions for the dimensions of a cuboid whose volume is given as $(2x^3 + 15x^2 + 33x + 20)$ cubic units? $(x > 0)$

If $\frac{x}{y}+\frac{y}{x}=-1$ $(x, y \neq 0)$,the value of $x^{3}-y^{3}$ is

Zero of the polynomial $p(x) = 2x + 5$ is

If $p(x) = x^2 - 4x + 3$,evaluate: $p(2) - p(-1) + p\left(\frac{1}{2}\right)$

Factorise the following:
$\left(2 x+\frac{1}{3}\right)^{2}-\left(x-\frac{1}{2}\right)^{2}$