{"result":{"text":"begin mathsize 14px style b with rightwards arrow on top equals negative i with hat on top plus 2 j with hat on top plus k equals open parentheses negative 1 comma 2 comma 1 close parentheses comma c with rightwards arrow on top equals open parentheses i with hat on top minus 2 j with hat on top plus 2 k close parentheses equals open parentheses 1 comma negative 2 comma 2 close parentheses end style"},"status":"ok"}