（ただし１と２を合せて１２のような使い方は出来ません。）
48個の解法が見つかりました。
((5×(6+8))÷7)=10
((5+(6+7))-8)=10
((5+6)+(7-8))=10
((5+6)-(8-7))=10
((5+7)+(6-8))=10
((5+7)-(8-6))=10
((5-8)+(6+7))=10
((5÷7)×(6+8))=10
((6+(5+7))-8)=10
((6+7)+(5-8))=10
((6+7)-(8-5))=10
((6+8)×(5÷7))=10
((6+8)÷(7÷5))=10
((6-8)+(5+7))=10
((7+(5+6))-8)=10
((7-8)+(5+6))=10
((8×(7-5))-6)=10
((8+(6×7))÷5)=10
(5×((6+8)÷7))=10
(5+((6+7)-8))=10
(5+(6+(7-8)))=10
(5+(6-(8-7)))=10
(5+(7+(6-8)))=10
(5+(7-(8-6)))=10
(5-((8-6)-7))=10
(5-((8-7)-6))=10
(5-(8-(6+7)))=10
(5÷(7÷(6+8)))=10
(6+((5+7)-8))=10
(6+(5+(7-8)))=10
(6+(5-(8-7)))=10
(6+(7+(5-8)))=10
(6+(7-(8-5)))=10
(6+(8÷(7-5)))=10
(6-((8-5)-7))=10
(6-((8-7)-5))=10
(6-(8-(5+7)))=10
(6-(8÷(5-7)))=10
(7+((5+6)-8))=10
(7+(5+(6-8)))=10
(7+(5-(8-6)))=10
(7+(6+(5-8)))=10
(7+(6-(8-5)))=10
(7-((8-5)-6))=10
(7-((8-6)-5))=10
(7-(8-(5+6)))=10
(8+((5+7)÷6))=10