The latex code
should display some latex code for pi/4. Cool! (Don't forget to use the compose window, not the "Edit Html" window.) Seems to only work for displayed equations.
Here is another test:
sage: x = var("x")
sage: integral(1/(1+x^2),x,0,1)
pi/4
sage: plot(1/(1+x^2),x,0,1)
The plot is below.
The (Hamming) weight enumerator polynomial $A_C$ is defined by
where
denotes the number of codewords of weight $i$.
The support of $C$ is the set
