（ただし１と２を合せて１２のような使い方は出来ません。）
73個の解法が見つかりました。
(((6+9)÷1)-5)=10
((1×(6+9))-5)=10
((1×6)+(9-5))=10
((1×6)-(5-9))=10
((1×9)+(6-5))=10
((1×9)-(5-6))=10
((1+9)×(6-5))=10
((1+9)÷(6-5))=10
((6+(1×9))-5)=10
((6+(9-5))÷1)=10
((6+(9÷1))-5)=10
((6+9)-(1×5))=10
((6+9)-(5÷1))=10
((6-(5-9))÷1)=10
((6-5)×(1+9))=10
((6-5)+(1×9))=10
((6-5)+(9÷1))=10
((6÷1)+(9-5))=10
((6÷1)-(5-9))=10
((9+(1×6))-5)=10
((9+(6-5))÷1)=10
((9+(6÷1))-5)=10
((9-(5-6))÷1)=10
((9-5)+(1×6))=10
((9-5)+(6÷1))=10
((9÷1)+(6-5))=10
((9÷1)-(5-6))=10
(1×((6+9)-5))=10
(1×(6+(9-5)))=10
(1×(6-(5-9)))=10
(1×(9+(6-5)))=10
(1×(9-(5-6)))=10
(1+(9×(6-5)))=10
(1+(9÷(6-5)))=10
(1-(9×(5-6)))=10
(1-(9÷(5-6)))=10
(5×((9-1)-6))=10
(5×((9-6)-1))=10
(5×(9-(1+6)))=10
(5÷((9÷6)-1))=10
(6+((1×9)-5))=10
(6+((9-5)÷1))=10
(6+((9÷1)-5))=10
(6+(1×(9-5)))=10
(6+(9-(1×5)))=10
(6+(9-(5÷1)))=10
(6-((1×5)-9))=10
(6-((5-9)÷1))=10
(6-((5÷1)-9))=10
(6-(1×(5-9)))=10
(6-(5-(1×9)))=10
(6-(5-(9÷1)))=10
(9+((1×6)-5))=10
(9+((1+5)÷6))=10
(9+((6-1)÷5))=10
(9+((6-5)÷1))=10
(9+((6÷1)-5))=10
(9+(1×(6-5)))=10
(9+(1÷(6-5)))=10
(9+(5÷(6-1)))=10
(9+(6-(1×5)))=10
(9+(6-(5÷1)))=10
(9+(6÷(1+5)))=10
(9-((1×5)-6))=10
(9-((1-6)÷5))=10
(9-((5-6)÷1))=10
(9-((5÷1)-6))=10
(9-(1×(5-6)))=10
(9-(1÷(5-6)))=10
(9-(5-(1×6)))=10
(9-(5-(6÷1)))=10
(9-(5÷(1-6)))=10