2 5 7 9 10
- 2 7 10 plus 5 9 10
- 7 9 10 minus 5 1 2
- 2 5 y 4 7 9 10 y
- 2 5 y 4 7 9 10y simplified
- 2 7-diamino pyrene-4 5 9 10-tetraone
- 5 7 8 minus 2 9 10
- 2 7 dibromopyrene 4 5 9 10 tetraone
- 8a2 2 5 10a 9 7
- 7 9 10 minus 5 1 2 fraction
- 2 5 of 5 7 of 7 9 of 9 10 of 250
- 7 5 2 4 x 10 9
- 7 9 10 minus 5 1 2 fraction in simplest form