+100 this; SymPy is the best! One of the coolest things about SymPy is the Live Shell, that let's you try basic calculations (without plotting) in the browser:

+100 this; SymPy is the best! One of the coolest things about SymPy is the Live Shell, that let's you try basic calculations (without plotting) in the browser: https://live.sympy.org https://live.sympy.org There is even an option to send the entire session encoded as URL querystring which makes it tweetable, emailable, etc. e.g. https://live.sympy.org/?evaluate=factor(x**2%2B5*x%2B6)%0A%23--%0A https://live.sympy.org/?evaluate=factor(x**2%2B5*x%2B6)%0A%2... (to generate the session-as-querystring for your current live.sympy.org session, use the thumbtack button below the prompt) I use this very often to send calculations and solutions—not only do you get the answer, but you see all the calculations.