Structural information in mathematical formulas for exercise difficulty prediction: a comparison of NLP representations Ekaterina Loginova author Dries Benoit author 2022-07 text Proceedings of the 17th Workshop on Innovative Use of NLP for Building Educational Applications (BEA 2022) Ekaterina Kochmar editor Jill Burstein editor Andrea Horbach editor Ronja Laarmann-Quante editor Nitin Madnani editor Anaïs Tack editor Victoria Yaneva editor Zheng Yuan editor Torsten Zesch editor Association for Computational Linguistics Seattle, Washington conference publication loginova-benoit-2022-structural 10.18653/v1/2022.bea-1.14 https://aclanthology.org/2022.bea-1.14/ 2022-07 101 106