（ただし１と２を合せて１２のような使い方は出来ません。）
64個の解法が見つかりました。
((2×4)-(3-5))=10
((2×5)×(4-3))=10
((2×5)÷(4-3))=10
((2+4)×(5÷3))=10
((2+4)÷(3÷5))=10
((3+(4+5))-2)=10
((3+4)+(5-2))=10
((3+4)-(2-5))=10
((3+5)+(4-2))=10
((3+5)+(4÷2))=10
((3+5)-(2-4))=10
((3-2)+(4+5))=10
((4+(3+5))-2)=10
((4+5)+(3-2))=10
((4+5)-(2-3))=10
((4-2)+(3+5))=10
((4-3)×(2×5))=10
((4÷2)+(3+5))=10
((5×(2+4))÷3)=10
((5+(2×4))-3)=10
((5+(3+4))-2)=10
((5-2)+(3+4))=10
((5-3)+(2×4))=10
((5÷3)×(2+4))=10
(2×(5×(4-3)))=10
(2×(5÷(4-3)))=10
(2+(4×(5-3)))=10
(2-(4×(3-5)))=10
(2÷((4-3)÷5))=10
(3+((4+5)-2))=10
(3+(4+(5-2)))=10
(3+(4-(2-5)))=10
(3+(5+(4-2)))=10
(3+(5+(4÷2)))=10
(3+(5-(2-4)))=10
(3-((2-4)-5))=10
(3-((2-5)-4))=10
(3-(2-(4+5)))=10
(4+((3+5)-2))=10
(4+(3+(5-2)))=10
(4+(3-(2-5)))=10
(4+(5+(3-2)))=10
(4+(5-(2-3)))=10
(4-((2-3)-5))=10
(4-((2-5)-3))=10
(4-(2-(3+5)))=10
(5×((2×3)-4))=10
(5×((2+4)÷3))=10
(5×(2×(4-3)))=10
(5×(2÷(4-3)))=10
(5+((2×4)-3))=10
(5+((3+4)-2))=10
(5+(3+(4-2)))=10
(5+(3+(4÷2)))=10
(5+(3-(2-4)))=10
(5+(4+(3-2)))=10
(5+(4-(2-3)))=10
(5-((2-3)-4))=10
(5-((2-4)-3))=10
(5-(2-(3+4)))=10
(5-(3-(2×4)))=10
(5÷((4-3)÷2))=10
(5÷(3÷(2+4)))=10