Factorise : $4 x^{2}+9 y^{2}+16 z^{2}+12 x y-24 y z-16 x z$
Use suitable identities to find the products : $(x+8)(x-10)$
Write the following cubes in expanded form : $\left[x-\frac{2}{3} y\right]^{3}$
Factorise : $49 a^{2}+70 a b+25 b^{2}$
Factorise each of the following : $27 p^{3}-\frac{1}{216}-\frac{9}{2} p^{2}+\frac{1}{4} p$