(5–9+4)/15
3/5–2/3+4/15
3/4+4/9–5/6
7/15+1/6+3/5
(9–10+4)/15
(20+27–24)/36
5/9+3/4–2/3
9/10–2/5–1/6
(27–12–5)/30
(18–15+8)/36
(14+5+18)/30
2/3+3/10–5/6
1/3–3/5+4/15
1/2–5/12+2/9
(20+9–25)/30
(27+16–30)/36
