sin^2xtanx+cos^2x/tanx+2sinxcosx-(1+cosx/sinxcosx)=sin^3x/cosx+cos^3x/sinx+2sinxcosx-(1+cosx/sinxcosx)=sin^4x.cos^4x/sinxcosx+2sinxcosx-(1+cosx/sinxcosx)=(sin^4x+cos^4x+2sin^2xcos^2x)/sinxcosx-(1+cosx...