Many Mathematica parameters don't work on Wolfram Alpha. I tried filling -> f which it does not recognize.
I am trying to plot a simple region bounded by $y = x^2$ and $y = x$ and shade that region in red.
I typed in
plot[x^2,x,{x,0,1}] red filling
and I got something really dumb. I don't want to make those inequality plots either.
Thanks.

plot area between x and x^2(see here for WA link, see here for image). Is the red shading absolutely necessary? – Zev Chonoles Jun 9 '12 at 3:46