（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。
(((4+9)÷1)-3)=10
((1×(4+9))-3)=10
((1×4)+(9-3))=10
((1×4)-(3-9))=10
((1×9)+(4-3))=10
((1×9)-(3-4))=10
((1+9)×(4-3))=10
((1+9)÷(4-3))=10
((1-3)×(4-9))=10
((3-1)×(9-4))=10
((4+(1×9))-3)=10
((4+(9-3))÷1)=10
((4+(9÷1))-3)=10
((4+9)-(1×3))=10
((4+9)-(3÷1))=10
((4-(3-9))÷1)=10
((4-3)×(1+9))=10
((4-3)+(1×9))=10
((4-3)+(9÷1))=10
((4-9)×(1-3))=10
((4÷1)+(9-3))=10
((4÷1)-(3-9))=10
((9+(1×4))-3)=10
((9+(4-3))÷1)=10
((9+(4÷1))-3)=10
((9-(3-4))÷1)=10
((9-3)+(1×4))=10
((9-3)+(4÷1))=10
((9-4)×(3-1))=10
((9÷1)+(4-3))=10
((9÷1)-(3-4))=10
(1×((4+9)-3))=10
(1×(4+(9-3)))=10
(1×(4-(3-9)))=10
(1×(9+(4-3)))=10
(1×(9-(3-4)))=10
(1+(9×(4-3)))=10
(1+(9÷(4-3)))=10
(1-(9×(3-4)))=10
(1-(9÷(3-4)))=10
(4+((1×9)-3))=10
(4+((9-3)÷1))=10
(4+((9÷1)-3))=10
(4+(1×(9-3)))=10
(4+(9-(1×3)))=10
(4+(9-(3÷1)))=10
(4-((1×3)-9))=10
(4-((3-9)÷1))=10
(4-((3÷1)-9))=10
(4-(1×(3-9)))=10
(4-(3-(1×9)))=10
(4-(3-(9÷1)))=10
(9+((1×4)-3))=10
(9+((1+3)÷4))=10
(9+((4-1)÷3))=10
(9+((4-3)÷1))=10
(9+((4÷1)-3))=10
(9+(1×(4-3)))=10
(9+(1÷(4-3)))=10
(9+(3÷(4-1)))=10
(9+(4-(1×3)))=10
(9+(4-(3÷1)))=10
(9+(4÷(1+3)))=10
(9-((1×3)-4))=10
(9-((1-4)÷3))=10
(9-((3-4)÷1))=10
(9-((3÷1)-4))=10
(9-(1×(3-4)))=10
(9-(1÷(3-4)))=10
(9-(3-(1×4)))=10
(9-(3-(4÷1)))=10
(9-(3÷(1-4)))=10