（ただし１と２を合せて１２のような使い方は出来ません。）
43個の解法が見つかりました。
((3+4)+(8-5))=10
((3+4)-(5-8))=10
((3+5)+(8÷4))=10
((3+8)+(4-5))=10
((3+8)-(5-4))=10
((3-5)+(4+8))=10
((4+(3+8))-5)=10
((4+8)+(3-5))=10
((4+8)-(5-3))=10
((4-5)+(3+8))=10
((8+(3+4))-5)=10
((8-5)+(3+4))=10
((8÷4)+(3+5))=10
(3+((4+8)-5))=10
(3+(4+(8-5)))=10
(3+(4-(5-8)))=10
(3+(5+(8÷4)))=10
(3+(8+(4-5)))=10
(3+(8-(5-4)))=10
(3-((5-4)-8))=10
(3-((5-8)-4))=10
(3-(5-(4+8)))=10
(4+((3+8)-5))=10
(4+(3+(8-5)))=10
(4+(3-(5-8)))=10
(4+(8+(3-5)))=10
(4+(8-(5-3)))=10
(4-((5-3)-8))=10
(4-((5-8)-3))=10
(4-(5-(3+8)))=10
(5+(3+(8÷4)))=10
(8+((3+4)-5))=10
(8+((3+5)÷4))=10
(8+(3+(4-5)))=10
(8+(3-(5-4)))=10
(8+(4+(3-5)))=10
(8+(4-(5-3)))=10
(8+(4÷(5-3)))=10
(8-((5-3)-4))=10
(8-((5-4)-3))=10
(8-(4÷(3-5)))=10
(8-(5-(3+4)))=10