（ただし１と２を合せて１２のような使い方は出来ません。）
53個の解法が見つかりました。
((3+(5+7))-5)=10
((3+5)+(7-5))=10
((3+5)-(5-7))=10
((3+7)×(5÷5))=10
((3+7)+(5-5))=10
((3+7)-(5-5))=10
((3+7)÷(5÷5))=10
((3-5)+(5+7))=10
((5×(3+7))÷5)=10
((5+(3+7))-5)=10
((5+7)+(3-5))=10
((5+7)-(5-3))=10
((5-5)+(3+7))=10
((5÷5)×(3+7))=10
((7+(3+5))-5)=10
((7-5)+(3+5))=10
(3+((5×7)÷5))=10
(3+((5+7)-5))=10
(3+(5×(7÷5)))=10
(3+(5+(7-5)))=10
(3+(5-(5-7)))=10
(3+(5÷(5÷7)))=10
(3+(7×(5÷5)))=10
(3+(7+(5-5)))=10
(3+(7-(5-5)))=10
(3+(7÷(5÷5)))=10
(3-((5-5)-7))=10
(3-((5-7)-5))=10
(3-(5-(5+7)))=10
(5×((3+7)÷5))=10
(5+((3+7)-5))=10
(5+(3+(7-5)))=10
(5+(3-(5-7)))=10
(5+(7+(3-5)))=10
(5+(7-(5-3)))=10
(5-((5-3)-7))=10
(5-((5-7)-3))=10
(5-(5-(3+7)))=10
(5÷(5÷(3+7)))=10
(7+((3×5)÷5))=10
(7+((3+5)-5))=10
(7+(3×(5÷5)))=10
(7+(3+(5-5)))=10
(7+(3-(5-5)))=10
(7+(3÷(5÷5)))=10
(7+(5×(3÷5)))=10
(7+(5+(3-5)))=10
(7+(5-(5-3)))=10
(7+(5÷(5÷3)))=10
(7-((5-3)-5))=10
(7-((5-5)-3))=10
(7-(5-(3+5)))=10