$$(p+q+\pi)^{3}$$
$p^{3}+3\pi p^{2}+3pq^{2}+6\pi pq+3\pi ^{2}p+q^{3}+3\pi q^{2}+3qp^{2}+3\pi ^{2}q+\pi ^{3}$
$\left(p+q+\pi \right)^{3}$
