hey, last week we had a homework with f**** 26 Integration problems, i killed my self and couldnt solve this 9, can anyone help with any ?sort of teach how to do

1. tan ^ 3 x sec x dx

2. sec ^ 4 x dx

3. [ dx / 2 - sin ^ 2 x ] dx

4. [ sin ^ 3 x / root over cos x ] dx

5. dx / 3 + 5 cos x

6. [ sin x / 1 + sin x ] dx

7. [ root over x / 1 + 4 root over x ^ 3 ] dx in here 4 is "on" the root over sign, i dont know how to say that in english, ****

8. [ root over ( 3 + 2x ) / x ] dx

9. dx / root over ( x + 1 ) + root over x

thankssssssssss