Question 1132982
I guess you have this:


 {{{ w^(3/2)*sqrt( 72 ) - w^(3/2)* sqrt( 98 ) }}} 


 {{{ sqrt(w^3)*sqrt(6^2*2 ) - sqrt(w^3)* sqrt( 7^2*2 ) }}} 


 {{{ w*sqrt(w)(6sqrt(2) -  7sqrt(2)) }}} 


 {{{ w*sqrt(w)(-sqrt(2)) }}}


{{{ -w*sqrt(w)*sqrt(2) }}}


{{{ -w*sqrt(2w) }}}