Let the equations of two adjacent sides of a parallelogram ABCD be $2 \mathrm{x}-3 \mathrm{y}=-23$ and $5 \mathrm{x}+4 \mathrm{y}=23$. If the equation of its one diagonal AC is $3 \mathrm{x}+7 \mathrm{y}=23$ and the distance of A from the other diagonal is d , then $50 \mathrm{~d}^2$ is equal to $\_\_\_\_$ .