Because the browser is not designed for mathematics. foe example, it does not support some symbols. Punctuation is not allowed in questions which means that it is not possible to show brackets, which can create ambiguity in questions. Powers are not displayed properly, etc.
you cant
it cant talk
you cant by the makers of wikianswers
you cant solve but you can simplify -55x
you cant.
Maybe your computer doesn't have the right software.
it can give you the right questions.
you cant
he cant
water
you cant with the information that you gave
you cant!