Hi everyone,

Can you please tell me if this is correct and if it isn't can you give me a hint or explain to me why it is wrong?

Evaluate the following integrals:

X/(X^2+1)^2dx

u=x^2+1

du+2xdx

xdx=du/2

x/(x^2+1)^2dx=

1/u^2du/2=

1/lnu^2+c=

1/2ln(x^2+1)^2

Thank you very much

P.S.

Does anyone know how to add math symbols on the computor? that is, how to add a square root, x squared etc.