请你根据其中的规律再写一道这样的算式:________。
①7÷ -
÷7
②[1-( +
)]×
③ ×6+
÷
④( +
-
)×72
⑤( +
)×7+
⑥ ÷[(
+
)×
]
×2= 12×
=
÷
=
÷
= 2÷
=
×
=
÷
=
÷
= 1÷
=
÷
=