Given x=4, y=3, z=2 and p=6, q=2p, r=q+p, evaluate the following expressions: a) x2 - y, b) xy + 2z, c) 2x + yz + y2, d) (xy)2 + yz - z, e) p+q+r

The value is $\boxed{13}$.

b) $xy + 2z$

The value is $\boxed{16}$.

c) $2x + yz + y^2$

The value is $\boxed{23}$.

d) $(xy)^2 + yz - z$

The value is $\boxed{148}$.

2. If $p=6$, $q=2p$, and $r=q+p$, what is the value of:

So, $p=6$, $q=12$, $r=18$.

a) $p + q + r$

The value is $\boxed{36}$.

b) $p(q - r)$

The value is $\boxed{-36}$.