The integral of

e^x / e^2x + 1 from upper limit:infinite and lower limit:0

So for I have the antderirive as:

this after changin the integration limits to a limit

limit t--> (arctan(e^x)) from b=infinte and a=0

and also this one

the integral of

ln(x)/x^2 from upper limit=b=infinte and lower limit=a=1 not sure how to start this one at all!