How to reduce a list of fractions

edit

To display blocks of code or error messages in Ask Sage, skip a line above and below, and do one of the following (all give the same result):

• indent all code lines with 4 spaces
• select all code lines and click the "code" button (the icon with '101 010')
• select all code lines and hit ctrl-K

For instance, typing

If we define `f` by

    def f(x, y, z):
        return x * y * z

then `f(2, 3, 5)` returns `30` but `f(2*3*5)` gives:

    TypeError: f() takes exactly 3 arguments (1 given)

produces:

If we define f by

def f(x, y, z):
    return x * y * z

then f(2, 3, 5) returns 30 but f(2*3*5) gives:

TypeError: f() takes exactly 3 arguments (1 given)

You can edit your question and answer to do that.

I've tried to edit all my mistakes (though I'm not sure, should Sage output be treated as code? I'm guessing no). If mistakes still remain, please let me know and I'll correct them. Thanks again.

Thanks for editing! One way to deal with the input and output is to start input lines with the Sage prompt and include output lines in the code block, without prompt (as in my answer).

Corrected, and once more thanks. If you see anything else that should be fixed, please let me know. I've learned a lot from your (and others') responses to this question!