factor the following using difference of two squares if the polynomial is not factorable just write prime polynomial

Answer:
1. (f-2) (f+2)
2. (2g²-3) (2g²+3)
3. (4h²-5) ( 4h²+5)
4. (3i-7s³) (3i+7s³)
5. (jk²-l³m⁴) (jk²+l³m⁴)