no package installation possible

[Feedback1000]

Hey.

I tried to install sympy.

Previously I installed IronPython 3.4.

The ipy -m pip install sympy==1.4 command didn't work because I received the following error message:

Der Befehl "ipy" ist entweder falsch geschrieben oder
konnte nicht gefunden werden..

Even though the path exists:

Can you help?

Regards,
Fabian