亲，回复如下，参考一下吧。
680-180÷5×24+61×37+37×39-39
=680-36x24+(61+39)x37-39
=680-36x24+100x37-40+1
=680-964+3700-40+1
=680+3700+1-964-40
=4381-1004
=3377
