Simplify sin3(x)+cos3(x)+3sin(x)cos(x)(sin(x)+cos(x))\sin^3(x) + \cos^3(x) + 3\sin(x)\cos(x)(\sin(x) + \cos(x))sin3(x)+cos3(x)+3sin(x)cos(x)(sin(x)+cos(x)).
(sin(x)+cos(x))3(\sin(x) + \cos(x))^3(sin(x)+cos(x))3
111
(sin(x)+cos(x))2(\sin(x) + \cos(x))^2(sin(x)+cos(x))2
sin(x)+cos(x)\sin(x) + \cos(x)sin(x)+cos(x)