Formula:
These are the equations used for calculation:
$$R_{2} = -A \times R_{1}$$
$$R_{3} = R_{1}$$
$$R_{4} = R_{3} \times \left( \dfrac{ (R_{1} + R_{2})V_{2} - V_{out2} }{ 2 V_{out2}
R_{1} } \right)$$
$$V_{out1} = A \times V_{1}$$
$$V_{out2} = V_{out} - V_{out1}$$