（ただし１と２を合せて１２のような使い方は出来ません。）
71個の解法が見つかりました。
(((5+9)-4)-0)=10
((0+(5+9))-4)=10
((0+5)+(9-4))=10
((0+5)-(4-9))=10
((0+9)+(5-4))=10
((0+9)-(4-5))=10
((0-4)+(5+9))=10
((5+(0+9))-4)=10
((5+(9-0))-4)=10
((5+(9-4))-0)=10
((5+9)+(0-4))=10
((5+9)-(0+4))=10
((5+9)-(4-0))=10
((5-(0-9))-4)=10
((5-(4-9))-0)=10
((5-0)+(9-4))=10
((5-0)-(4-9))=10
((5-4)+(0+9))=10
((5-4)+(9-0))=10
((5-4)-(0-9))=10
((9+(0+5))-4)=10
((9+(5-0))-4)=10
((9+(5-4))-0)=10
((9-(0-5))-4)=10
((9-(4-5))-0)=10
((9-0)+(5-4))=10
((9-0)-(4-5))=10
((9-4)+(0+5))=10
((9-4)+(5-0))=10
((9-4)-(0-5))=10
(0+((5+9)-4))=10
(0+(5+(9-4)))=10
(0+(5-(4-9)))=10
(0+(9+(5-4)))=10
(0+(9-(4-5)))=10
(0-((4-5)-9))=10
(0-((4-9)-5))=10
(0-(4-(5+9)))=10
(5+((0+9)-4))=10
(5+((9-0)-4))=10
(5+((9-4)-0))=10
(5+(0+(9-4)))=10
(5+(0-(4-9)))=10
(5+(9+(0-4)))=10
(5+(9-(0+4)))=10
(5+(9-(4-0)))=10
(5-((0+4)-9))=10
(5-((4-0)-9))=10
(5-((4-9)-0))=10
(5-(0+(4-9)))=10
(5-(0-(9-4)))=10
(5-(4+(0-9)))=10
(5-(4-(0+9)))=10
(5-(4-(9-0)))=10
(9+((0+5)-4))=10
(9+((5-0)-4))=10
(9+((5-4)-0))=10
(9+(0+(5-4)))=10
(9+(0-(4-5)))=10
(9+(5+(0-4)))=10
(9+(5-(0+4)))=10
(9+(5-(4-0)))=10
(9-((0+4)-5))=10
(9-((4-0)-5))=10
(9-((4-5)-0))=10
(9-(0+(4-5)))=10
(9-(0-(5-4)))=10
(9-(4+(0-5)))=10
(9-(4-(0+5)))=10
(9-(4-(5-0)))=10