Which expression is equivalent to sin6x+cos6x\sin^6 x + \cos^6 xsin6x+cos6x?
1−3sin2xcos2x1 - 3\sin^2 x \cos^2 x1−3sin2xcos2x
1−2sin2xcos2x1 - 2\sin^2 x \cos^2 x1−2sin2xcos2x
1−4sin2xcos2x1 - 4\sin^2 x \cos^2 x1−4sin2xcos2x
1−6sin2xcos2x1 - 6\sin^2 x \cos^2 x1−6sin2xcos2x