How did miss murry get Calvin and meg out of IT fomain?

Miss Murry, with the help of her scientific knowledge and determination, used her understanding of the tesseract to navigate through the dangerous realm of IT. She focused on the bond between Calvin and Meg, encouraging them to harness their love and courage to break free from IT's control. This emotional strength allowed them to resist IT's manipulation, ultimately leading to their escape. Through her guidance, they were able to reconnect with their true selves and overcome the dark force of IT.