I'm having some math problems here which I don't know how to solve, I'm really clueless.

I don't have any program that can display integrals and stuff like that, maybe a tip on any? Also I'm not native English.

1)

Find the primitive function for e^(x) * cos (x)

2)

Find the primitive to x / ( cos(x) ^2 )

3)

Find the primitive to e^( sqrt(x) ) with 1 as higher boundary and 0 as lower.

Hint: substitute with t = sqrt(x)

Any help is really appreciated.