I need help with these 3 problems. Please explain so I can know how to do them. I did try some of them

Find a formula for the inverse of the function.

26. y=e^x/1+2e^x

Find the exact value of each expression.

34. (a) ln(1/e)= -1 I don't if that's right.

36. (b) ln(ln e^e10)

Express the given quantity as a single logarithm.

ln(1+x^2) + 1/2 ln x - ln sin x = ln sq[1+x^2]/ sin x

THis is my first week of college and it's already hard. I have a quiz tomorrow.