Determine the degree of each of the following polynomials:

$2 x-1$

Factorise

$8 x^{3}+125 y^{3}+343-210 x y$

Find the quotient and the remainder when $x^{3}+x^{2}-10 x+8$ is divided by

$x+4$

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

$t^{2}$

Expand the following:

$(4 a-b+2 c)^{2}$