（ただし１と２を合せて１２のような使い方は出来ません。）
41個の解法が見つかりました。
((4+5)+(7-6))=10
((4+5)-(6-7))=10
((4+7)+(5-6))=10
((4+7)-(6-5))=10
((4-6)+(5+7))=10
((5×6)÷(7-4))=10
((5+(4+7))-6)=10
((5+7)+(4-6))=10
((5+7)-(6-4))=10
((5-6)+(4+7))=10
((7+(4+5))-6)=10
((7-6)+(4+5))=10
(4+((5+7)-6))=10
(4+(5+(7-6)))=10
(4+(5-(6-7)))=10
(4+(7+(5-6)))=10
(4+(7-(6-5)))=10
(4-((6-5)-7))=10
(4-((6-7)-5))=10
(4-(6-(5+7)))=10
(5×(6÷(7-4)))=10
(5+((4+7)-6))=10
(5+(4+(7-6)))=10
(5+(4-(6-7)))=10
(5+(7+(4-6)))=10
(5+(7-(6-4)))=10
(5-((6-4)-7))=10
(5-((6-7)-4))=10
(5-(6-(4+7)))=10
(5÷((7-4)÷6))=10
(6×(5÷(7-4)))=10
(6÷((7-4)÷5))=10
(7+((4+5)-6))=10
(7+(4+(5-6)))=10
(7+(4-(6-5)))=10
(7+(5+(4-6)))=10
(7+(5-(6-4)))=10
(7-((6-4)-5))=10
(7-((6-5)-4))=10
(7-(6-(4+5)))=10