{"result":{"text":"r with rightwards arrow on top subscript A equals a left parenthesis i with hat on top plus 2 i with hat on top plus 3 k with hat on top right parenthesis comma space space space space space space space space r with rightwards arrow on top subscript B equals a left parenthesis i with hat on top minus 2 i with hat on top plus 6 k with hat on top right parenthesis"},"status":"ok"}