（ただし１と２を合せて１２のような使い方は出来ません。）
71個の解法が見つかりました。
(((8+9)-7)-0)=10
((0+(8+9))-7)=10
((0+8)+(9-7))=10
((0+8)-(7-9))=10
((0+9)+(8-7))=10
((0+9)-(7-8))=10
((0-7)+(8+9))=10
((8+(0+9))-7)=10
((8+(9-0))-7)=10
((8+(9-7))-0)=10
((8+9)+(0-7))=10
((8+9)-(0+7))=10
((8+9)-(7-0))=10
((8-(0-9))-7)=10
((8-(7-9))-0)=10
((8-0)+(9-7))=10
((8-0)-(7-9))=10
((8-7)+(0+9))=10
((8-7)+(9-0))=10
((8-7)-(0-9))=10
((9+(0+8))-7)=10
((9+(8-0))-7)=10
((9+(8-7))-0)=10
((9-(0-8))-7)=10
((9-(7-8))-0)=10
((9-0)+(8-7))=10
((9-0)-(7-8))=10
((9-7)+(0+8))=10
((9-7)+(8-0))=10
((9-7)-(0-8))=10
(0+((8+9)-7))=10
(0+(8+(9-7)))=10
(0+(8-(7-9)))=10
(0+(9+(8-7)))=10
(0+(9-(7-8)))=10
(0-((7-8)-9))=10
(0-((7-9)-8))=10
(0-(7-(8+9)))=10
(8+((0+9)-7))=10
(8+((9-0)-7))=10
(8+((9-7)-0))=10
(8+(0+(9-7)))=10
(8+(0-(7-9)))=10
(8+(9+(0-7)))=10
(8+(9-(0+7)))=10
(8+(9-(7-0)))=10
(8-((0+7)-9))=10
(8-((7-0)-9))=10
(8-((7-9)-0))=10
(8-(0+(7-9)))=10
(8-(0-(9-7)))=10
(8-(7+(0-9)))=10
(8-(7-(0+9)))=10
(8-(7-(9-0)))=10
(9+((0+8)-7))=10
(9+((8-0)-7))=10
(9+((8-7)-0))=10
(9+(0+(8-7)))=10
(9+(0-(7-8)))=10
(9+(8+(0-7)))=10
(9+(8-(0+7)))=10
(9+(8-(7-0)))=10
(9-((0+7)-8))=10
(9-((7-0)-8))=10
(9-((7-8)-0))=10
(9-(0+(7-8)))=10
(9-(0-(8-7)))=10
(9-(7+(0-8)))=10
(9-(7-(0+8)))=10
(9-(7-(8-0)))=10