More integration:evaluation

Just put a yes or no as to my answer =P, c is a constant, sorry about format and squareroots

1) integrate: (x^4-2x^3+5x+1)/(x^4) dx

I got: x -5/(2x^3) -3/(x^3) -2 +c

2) integrate: sinx/(squareroot of cosx) dx

I got: -0.5(squareroot of cosx) +c

3) integrate (e^x)squareroot(e^x+4) dx

I got: 0.5(squareroot e^x+4) +c

4) integrate xe^(x^2+1) dx

I got: 0.5e^(x^2+1) +c

5) integrate 1/((squareroot x)((squareroot x) +1)^2) dx

Sorry about this 1 a bit hard to read.

It is 1 divided by (rootx)(rootx plus 1)squared

anyways..I got: -2/(squareroot x +1) +c

LAST ONE =P

6) integrate (x^2)/(1+x^6) done through two substitutions

let u=x^3 , then let u=root3 tan theta

In the end i got: (squareroot 3)*arctan((x^3)/(squareroot 3)) +c

arctan is tan^-1 for anyone maths illiterate reading this.

I hope to see 6 yeses in your answers and thanks in advance =P