{"result":{"text":"begin mathsize 14px style r with rightwards arrow on top equals fraction numerator negative a with rightwards arrow on top over denominator 2 end fraction plus fraction numerator 3 b with rightwards arrow on top over denominator 2 end fraction plus 5 over 4 open parentheses a with rightwards arrow on top cross times b with rightwards arrow on top close parentheses end style"},"status":"ok"}