（ただし１と２を合せて１２のような使い方は出来ません。）
44個の解法が見つかりました。
((3+(4+9))-6)=10
((3+4)+(9-6))=10
((3+4)-(6-9))=10
((3+9)+(4-6))=10
((3+9)-(6-4))=10
((3-6)+(4+9))=10
((4+(3+9))-6)=10
((4+9)+(3-6))=10
((4+9)-(6-3))=10
((4-6)+(3+9))=10
((6×(9-4))÷3)=10
((6÷3)×(9-4))=10
((9+(3+4))-6)=10
((9-4)×(6÷3))=10
((9-4)÷(3÷6))=10
((9-6)+(3+4))=10
(3×(4-(6÷9)))=10
(3+((4+9)-6))=10
(3+(4+(9-6)))=10
(3+(4-(6-9)))=10
(3+(9+(4-6)))=10
(3+(9-(6-4)))=10
(3-((6-4)-9))=10
(3-((6-9)-4))=10
(3-(6-(4+9)))=10
(4+((3+9)-6))=10
(4+(3+(9-6)))=10
(4+(3-(6-9)))=10
(4+(9+(3-6)))=10
(4+(9-(6-3)))=10
(4-((6-3)-9))=10
(4-((6-9)-3))=10
(4-(6-(3+9)))=10
(6×((9-4)÷3))=10
(6÷(3÷(9-4)))=10
(9+((3+4)-6))=10
(9+(3+(4-6)))=10
(9+(3-(6-4)))=10
(9+(4+(3-6)))=10
(9+(4-(6-3)))=10
(9-((6-3)-4))=10
(9-((6-4)-3))=10
(9-(6-(3+4)))=10