{"result":{"text":"fraction numerator open parentheses z subscript 1 minus z subscript 4 close parentheses open parentheses z subscript 2 minus z subscript 3 close parentheses over denominator open parentheses z subscript 1 minus z subscript 2 close parentheses open parentheses z subscript 3 minus z subscript 4 close parentheses end fraction"},"status":"ok"}