{"result":{"text":"begin mathsize 14px style calligraphic l subscript 1 equals left parenthesis 3 plus t right parenthesis i with hat on top plus left parenthesis negative 1 plus 2 t right parenthesis j with hat on top plus left parenthesis 4 plus 2 t right parenthesis k with hat on top comma negative infinity less than t less than infinity end style"},"status":"ok"}