{"result":{"text":"begin mathsize 14px style r with rightwards arrow on top equals open parentheses 1 minus t close parentheses open parentheses 3 i with hat on top minus 4 j with hat on top plus 7 k with hat on top close parentheses plus t open parentheses i with hat on top plus j with hat on top minus k with hat on top close parentheses plus s open parentheses negative 2 i with hat on top plus j with hat on top minus k with hat on top close parentheses end style"},"status":"ok"}