# Show function seems to be broken [closed]

I read the thread How to make the Show function work in this case?. I think I have the same problem as discussed there. But when I try the to evaluate

Show[Plot[x^2, {x, 2, 10}], Plot[1 - x, {x, 1, -10}],
PlotRange -> All]


it doesn't work. The output:

.

How can I fix it?

Update: This comes afterClear["*", All];. Clear["*", All]; Show[Plot[x^2, {x, 2, 10}], Plot[1 - x, {x, 1, -10}], PlotRange -> All] makes it failed.

• Have you played with $DisplayFunction? What if you evaluate $DisplayFunction = Identity?
– Kuba
Jul 15 '16 at 6:04
• @Kuba Now I can't reproduce it after restart Mathematica for several times... Why should I evaluate $DisplayFunction = Identity? What's Identity? I have never heard it before. Jul 15 '16 at 6:40 • Both of those symbols can be looked up by pressing F1. – Kuba Jul 15 '16 at 6:43 • I'm voting to close this question as off-topic because the problem the user is experiencing can not be reproduced by others. Jul 15 '16 at 6:58 • @m_goldberg I know what I did. Add Clear["*", All]; before the command can reproduce it. I can't see why Claer makes it failed. Jul 15 '16 at 7:10 ## 1 Answer Clear["*"] clears every symbol found on $ContextPath which is not Protected. So many System symbols too...

Moreover, unless you want to double clear SystemAll, Clear["*", All] is made up syntax.

What you probably want is Clear["Global*"] or ClearAll["Global*"]

Weren't you warned by:

• Ergo, Show appeared to be broken because the OP broke it. Jul 15 '16 at 7:29