（ただし１と２を合せて１２のような使い方は出来ません。）
44個の解法が見つかりました。
(((7+8)-3)-2)=10
((2×(7+8))÷3)=10
((2÷3)×(7+8))=10
((3×8)-(2×7))=10
((7+(8-2))-3)=10
((7+(8-3))-2)=10
((7+8)×(2÷3))=10
((7+8)-(2+3))=10
((7+8)÷(3÷2))=10
((7-(2-8))-3)=10
((7-(3-8))-2)=10
((7-2)+(8-3))=10
((7-2)-(3-8))=10
((7-3)+(8-2))=10
((7-3)-(2-8))=10
((8+(7-2))-3)=10
((8+(7-3))-2)=10
((8-(2-7))-3)=10
((8-(3-7))-2)=10
((8-2)+(7-3))=10
((8-2)-(3-7))=10
((8-3)+(7-2))=10
((8-3)-(2-7))=10
(2×((7+8)÷3))=10
(2÷(3÷(7+8)))=10
(7+((8-2)-3))=10
(7+((8-3)-2))=10
(7+(8-(2+3)))=10
(7-((2+3)-8))=10
(7-(2+(3-8)))=10
(7-(2-(8-3)))=10
(7-(3+(2-8)))=10
(7-(3-(8-2)))=10
(8+((7-2)-3))=10
(8+((7-3)-2))=10
(8+((7-3)÷2))=10
(8+(7-(2+3)))=10
(8-((2+3)-7))=10
(8-((3-7)÷2))=10
(8-(2+(3-7)))=10
(8-(2-(7-3)))=10
(8-(3+(2-7)))=10
(8-(3-(7-2)))=10