55-57 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...

55. The differential xnex^2 dx is integrable if n is A. an even integer C. any positive integer B. an odd integer D. any whole number 56. Which of the following cannot be evaluated by the power rule formula ? A. S (dx) / x2 (1 + (2/x) ) 3 C. S (In(x+1)dx) / (x+1) B. S (V1 + sinx) dx / (secx) D. S ( x2 Vx2 + 4 ) dx 57. Evaluate: "(5x2 - 8x + 5) dx a. 60 b. 61 C. 62 d. 63