I just registered and am excited to join the community. My problem is: . I feel like I am very close but have overlooked some things. I am aware that derivative of ln is 1/x but I can't seem to get the final answer right. Also, one that has been bugging me for a few days is . For this one I have gotten stuff like 1/xsqrt(x^2-5)*sqrt(x^2-5)+1/(2(sqrt(X^2-5))) *2x^2. Any help would be much appreciated.