Write the following cubes in expanded form

$(3 a+5 b)^{3}$

Classify the following as a constant, linear,quadratic and cubic polynomials:

$y^{3}-y$

Write the following cubes in expanded form

$(2 a-5 b)^{3}$

Find the following products:

$\left(\frac{x}{2}+2 y\right)\left(\frac{x^{2}}{4}-x y+4 y^{2}\right)$

Expand

$\left(\frac{x}{2}+\frac{2 y}{3}-\frac{3 z}{4}\right)^{2}$

The degree of polynomial $5 x^{2}-7 x-11$ is..........