19-22 please help please... this is just our review... no need for solution please. answer directly only.... please... IN RETURN I WILL GIVE HELPFUL RATING DIRECTLY...

19. Evaluate 3dx x(x+3) A. 3 Inx(x + 3) + C C. In -+ C x+3 B. -In - X + C 3 x+3 D. In x (x + 3) + C 20. Evaluate the integral of x sin 2x dx. 4 A. - = cos 2x + = sin 2x + C C. = cos 2x - =sin 2x + C B. ~ cos 2x - = sin 2x + C D. - - cos 2x + = sin 2x + C 21. Evaluate Sex sin x dx . A. ex (sin x - cos x) + C C. - ex(sin x - cos x) + C B. - ex(cos x + sin x) + C D. ex (cos x + sinx) + C 22. Evaluate S arctan x dx . A. arctan x - In V1 + x2 C. x arctan x - V1 + x^2 + C B. arctan x + 2In (1 + x2) D. x arctan x + In(1 + x2) + C