SORRY i really don't know how to put these symbols such as Integral sign ,

1. Integrate forSEC X/3 DXFROM (-PI) --> (PI)

( I think these problems are using substitution to solve but I just can't work it out like how to put them together to solve.

2. Integrate forcsc(x-pie) dxfrom ( from 3pi/2 ---> 7pie/4 )

3. Integrate fordx/√of (1- 9x^2 )from ( 0 ---> 1/6 )

4. Integrate for6 DX / X √ OF 25X^2 -1FROM (2(5√3) ---> 2/5

5. Integrate forsec piex DXfrom ( 0 ---> 1/4 )

Please tell me how to start and I can solve the rest . Thank you