Question 6's simplified expression is [tex]18x^{2}z\f/y[/tex]
Question 7's simplified expression is [tex]\frac{x(1-2x^{3})}{(x-1) (2x-1)}[/tex]
Question 8a in simplest form is [tex]-\frac{q-4p}{q(q-p)}[/tex]
Question 8b in simplest form is [tex]\frac{2x(2x+1)}{(x+1) (x - 1)}[/tex]
Question 8c in simplest form is [tex]\frac{5x + 4}{(3+x) (x-3)}[/tex]
