（ただし１と２を合せて１２のような使い方は出来ません。）
55個の解法が見つかりました。
((2×5)÷(7-6))=10
((2×6)+(5-7))=10
((2×6)-(7-5))=10
((2+(6+7))-5)=10
((2+6)+(7-5))=10
((2+6)-(5-7))=10
((2+7)+(6-5))=10
((2+7)-(5-6))=10
((2-5)+(6+7))=10
((5+(2×6))-7)=10
((5-7)+(2×6))=10
((6×(7-5))-2)=10
((6+(2+7))-5)=10
((6+7)+(2-5))=10
((6+7)-(5-2))=10
((6-5)+(2+7))=10
((7+(2+6))-5)=10
((7-5)+(2+6))=10
((7-6)×(2×5))=10
(2×(5×(7-6)))=10
(2×(5÷(7-6)))=10
(2+((6+7)-5))=10
(2+(6+(7-5)))=10
(2+(6-(5-7)))=10
(2+(7+(6-5)))=10
(2+(7-(5-6)))=10
(2-((5-6)-7))=10
(2-((5-7)-6))=10
(2-(5-(6+7)))=10
(2÷((7-6)÷5))=10
(5×(2×(7-6)))=10
(5×(2÷(7-6)))=10
(5+((2×6)-7))=10
(5-(7-(2×6)))=10
(5÷((7-6)÷2))=10
(6+((2+7)-5))=10
(6+(2×(7-5)))=10
(6+(2+(7-5)))=10
(6+(2-(5-7)))=10
(6+(7+(2-5)))=10
(6+(7-(5-2)))=10
(6-((5-2)-7))=10
(6-((5-7)-2))=10
(6-(2×(5-7)))=10
(6-(5-(2+7)))=10
(6÷(2-(7÷5)))=10
(7+((2+6)-5))=10
(7+(2+(6-5)))=10
(7+(2-(5-6)))=10
(7+(6+(2-5)))=10
(7+(6-(5-2)))=10
(7-((5-2)-6))=10
(7-((5-6)-2))=10
(7-(5-(2+6)))=10