Question 74488
Sorry ... no.  You are combining terms that should not be.  
{{{ 7w(2w-3)(2w+3) }}}
First you must foil the (2w-3)(2w+3)
{{{ 7w(4w^2 - 9) }}}
Now distribute the 7w
{{{ 28w^3 -63w }}}
Done.