Solving integration with by MatLab

How to solve the following integrations for the values 0 to inf in MATLAB? Here, a and b are constant

1. log(x + 1)*exp(-a*x))/(b*x + 1)

2. log(x + 1)*exp(-a*x))/((b*x + 1)^2)

Please derive the step by step to find a solution.

Answer 1

[Walter Roberson]

There is no closed form formula for int( (log(x + 1)*exp(-a*x))/(b*x + 1), x, 0, inf)

There is no closed form formula for int(log(x+1)*exp(-a*x)/(b*x+1)^2, x, 0, inf)