（ただし１と２を合せて１２のような使い方は出来ません。）
51個の解法が見つかりました。
(((6+7)-2)-1)=10
((1×7)+(6÷2))=10
((2×(1+7))-6)=10
((6+(7-1))-2)=10
((6+(7-2))-1)=10
((6+7)-(1+2))=10
((6-(1-7))-2)=10
((6-(2-7))-1)=10
((6-1)+(7-2))=10
((6-1)-(2-7))=10
((6-2)+(7-1))=10
((6-2)-(1-7))=10
((6÷2)+(1×7))=10
((6÷2)+(7÷1))=10
((7+(6-1))-2)=10
((7+(6-2))-1)=10
((7+(6÷2))÷1)=10
((7-(1-6))-2)=10
((7-(2-6))-1)=10
((7-1)+(6-2))=10
((7-1)-(2-6))=10
((7-2)+(6-1))=10
((7-2)-(1-6))=10
((7÷1)+(6÷2))=10
(1×(7+(6÷2)))=10
(6+((1+7)÷2))=10
(6+((7-1)-2))=10
(6+((7-2)-1))=10
(6+(7-(1+2)))=10
(6-((1+2)-7))=10
(6-(1+(2-7)))=10
(6-(1-(7-2)))=10
(6-(2+(1-7)))=10
(6-(2-(7-1)))=10
(7+((1×6)÷2))=10
(7+((6-1)-2))=10
(7+((6-2)-1))=10
(7+((6÷1)÷2))=10
(7+((6÷2)÷1))=10
(7+(1×(6÷2)))=10
(7+(1÷(2÷6)))=10
(7+(6×(1÷2)))=10
(7+(6-(1+2)))=10
(7+(6÷(1×2)))=10
(7+(6÷(2÷1)))=10
(7-((1+2)-6))=10
(7-(1+(2-6)))=10
(7-(1-(6-2)))=10
(7-(2+(1-6)))=10
(7-(2-(6-1)))=10