{"result":{"text":"tan to the power of negative 1 end exponent open square brackets fraction numerator c over denominator a plus b end fraction close square brackets plus tan to the power of negative 1 end exponent open square brackets fraction numerator b over denominator a plus c end fraction close square brackets equals tan to the power of negative 1 end exponent open square brackets fraction numerator fraction numerator c over denominator a plus b end fraction plus fraction numerator b over denominator a plus c end fraction over denominator 1 minus open parentheses fraction numerator c over denominator a plus b end fraction close parentheses open parentheses fraction numerator b over denominator a plus c end fraction close parentheses end fraction close square brackets equals tan to the power of negative 1 end exponent open square brackets fraction numerator a c plus c squared plus a b plus b squared over denominator a squared plus a c plus a b plus b c minus b c end fraction close square brackets"},"status":"ok"}