task_categories:text-generation task_categories:question-answering language:en license:apache-2.0 license:mit license:unknown size_categories:1M<n<10M format:parquet modality:text library:datasets library:dask library:mlcroissant library:polars arxiv:2504.11456 arxiv:2505.22312 arxiv:2503.14476 region:us math reasoning verl reinforcement-learning math-reasoning unified-collection