Hello everybody

I am just looking at sketching graphs and I came across a problem that
has me stumped.  The graph I am trying to sketch is

(x-3) / ( (x+1) * (x-2) )

now I have plotted the graph in sage on my TI-83 and at wolfram and
they all different.  Now I am thinking is sage right and the others
wrong? or have I made an error inputting the equation?

I would certainly welcome some help on the issue

Thanks in advance

Dan

PS this is just for fun and not an exam piece or any test

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