>>65564911
LaTeX's syntax for mathematics may not be completely impossible to translate, but a parser for:
\sum_{n = 0}^\infty \frac{(-1)^{n}}{2n+1} = 1 - \frac{1}{3} + \frac{1}{5} - \frac{1}{7} + \cdots = \frac{\pi}{4}
Is much harder to write than a parser for (imagined example for layout code):
a = [1 2 n * + -1 n ^ /]
a a 4 sum `=` a -1 sum
where sum takes two variables: a function, and a number; displays the first n steps of the number, or all steps if n == -1. One is much cleaner than the other and could be evaluated as actual mathematics.