the 'syms x' command doesn't work in online terminal:
octave:33> syms x
out = <output_block>
<list>
<item>
<f>
1003
</f>
<f>
Communication established.
</f>
</item>
<item>
<f>
1003
</f>
<f>
0.7.6
</f>
</item>
<item>
<f>
1003
</f>
<f>
2.6.6 (r266:84292, Jan 22 2014, 09:42:36)
[GCC 4.4.7 20120313 (Red Hat 4.4.7-4)]
</f>
</item>
</list>
</output_block>

A =
{
[1,1] =
Communication established.

[1,2] =
0.7.6

[1,3] =
2.6.6 (r266:84292, Jan 22 2014, 09:42:36)
[GCC 4.4.7 20120313 (Red Hat 4.4.7-4)]

}
error: ipcpopen2: failed to send variables to python?
error: called from:
error: /usr/local/share/octave/packages/symbolic-2.1.0/private/pythonipcpopen2.m at line 115, column 5
error: /usr/local/share/octave/packages/symbolic-2.1.0/private/pythonipcdriver.m at line 30, column 13
error: /usr/local/share/octave/packages/symbolic-2.1.0/pythoncmd.m at line 120, column 9
error: /usr/local/share/octave/packages/symbolic-2.1.0/@sym/sym.m at line 279, column 5
error: evaluating argument list element number 3
error: /usr/local/share/octave/packages/symbolic-2.1.0/syms.m at line 157, column 9