x-6/x+1/x²+x/x²-36-x-6/x

问题描述:

x-6/x+1/x²+x/x²-36-x-6/x

x-6/x+1/x²+x/x²-36-x-6/x
=(x-x)+(-6/x-6/x+x/x²)+1/x²-36
=1/x²-11/x-36