MMTU: A Massive Multi-Task Table Understanding and Reasoning Benchmark - Xing, Junjie; He, Yeye; Zhou, Mengyu; Dong, Haoyu; Han, Shi; Chen, Lingjiao; Zhang, Dongmei; Chaudhuri, Surajit; Jagadish, H. V. (Advances in Neural Information Processing Systems, 2025)