Question 45610
{{{2p^4  + 17p^3  + 21p^2}}}
{{{p^2(2p^2  + 17p  + 21)}}}
{{{p^2(2p^2  + 14p + 3p + 21)}}}
{{{p^2((2p^2  + 14p) + (3p + 21))}}}
{{{p^2(2p(p  + 7) + 3(p + 7))}}}
{{{p(p)(2p + 3)(p + 7)}}}
{{{p(2p^2 + 3p)(p + 7)}}}
length = {{{2p^2 + 3p}}}