（ただし１と２を合せて１２のような使い方は出来ません。）
22個の解法が見つかりました。
((4+4)+(5-3))=10
((4+4)-(3-5))=10
((4+5)+(4-3))=10
((4+5)-(3-4))=10
((4-3)+(4+5))=10
((5+(4+4))-3)=10
((5-3)+(4+4))=10
(4+((4+5)-3))=10
(4+(4+(5-3)))=10
(4+(4-(3-5)))=10
(4+(5+(4-3)))=10
(4+(5-(3-4)))=10
(4-((3-4)-5))=10
(4-((3-5)-4))=10
(4-(3-(4+5)))=10
(5×(3-(4÷4)))=10
(5+((4+4)-3))=10
(5+(4+(4-3)))=10
(5+(4-(3-4)))=10
(5-((3-4)-4))=10
(5-(3-(4+4)))=10