I have a Maple text window open all the time so I can pop it up and type '2+2;' into it. I thought this was ridiculous when I saw someone else doing it, but I've come round to it.
But for algebra I use bits of scrap paper or envelopes -- and then check the results with Maple.
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[X] at the Python interactive prompt
[X] at the Maxima interactive prompt
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(S)
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But for algebra I use bits of scrap paper or envelopes -- and then check the results with Maple.
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[X] using perl -e
[X] using dc