Expand

$(6 x-7)^{2}$

Expand

$(2 x-y-5)^{2}$

Write the following cubes in expanded form

$(3 x+2 y)^{3}$

Expand the following:

$(-x+2 y-3 z)^{2}$

Factorise

$x^{3}-11 x^{2}+20 x+32$

Classify the following polynomials as polynomials in one variable, two variables etc.

$x y+y z+z x$