{"result":{"text":"begin mathsize 14px style open vertical bar r with rightwards arrow on top close vertical bar equals fraction numerator a with rightwards arrow on top over denominator 2 end fraction minus 3 over 4 b with rightwards arrow on top 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"}