thanks!

来源：学生作业帮助网 编辑：作业帮 时间：2024/11/25 07:54:15
thanks!
x]N0 J{Bki|X"$G"\gLa_l˖~wy;v5kvcހ4JG( 0}l=qG\Q

thanks!
thanks!

thanks!
原式=-1-1+1+1
=0

THANKS thanks: Thanks thanks thanks Thanks! -Thanks. thanks thanks! thanks thanks! thanks thanks thanks thanks~ thanks thanks ,thanks!