{"result":{"text":"open square brackets n with rightwards arrow on top subscript 1 space n with rightwards arrow on top subscript 2 space n with rightwards arrow on top subscript 3 close square brackets open parentheses r with rightwards arrow on top times n with rightwards arrow on top subscript 4 minus q subscript 4 close parentheses equals open square brackets n with rightwards arrow on top subscript 4 space n with rightwards arrow on top subscript 3 space n with rightwards arrow on top subscript 1 close square brackets"},"status":"ok"}