Expand

$\left(x-\frac{1}{2}\right)^{2}$

Without finding the cubes, factorise

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

Find $p(1), p(2)$ and $p(4)$ for each of the following polynomials

$p(y)=y^{2}-5 y+4$

Write the degree of the following polynomials

$\sqrt{11} t+14$

Factorise the following:

$1-64 a^{3}-12 a+48 a^{2}$