Initial upload of medium (level 2,3) math dataset

Math dataset containing 191,167 examples from the medium (level 2,3) difficulty level. Includes algebra, arithmetic, matrix operations, combinatorics, geometry, and logic puzzles.

README.md

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+---
+dataset_info:
+  features:
+  - name: id
+    dtype: string
+  - name: setting_key
+    dtype: string
+  - name: difficulty
+    dtype: string
+  - name: level
+    dtype: int64
+  - name: messages
+    sequence: string
+  - name: ground_truth
+    dtype: string
+  - name: dataset
+    dtype: string
+  - name: omega_split
+    dtype: string
+  splits:
+  - name: train
+    num_bytes: 96601406
+    num_examples: 191167
+  download_size: 13238557
+  dataset_size: 96601406
+configs:
+- config_name: default
+  data_files:
+  - split: train
+    path: data/train-*
+---

data/train-00000-of-00001.parquet

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+version https://git-lfs.github.com/spec/v1
+oid sha256:298644d0b55bcc95e39319ae02db332eacd177b70c881b7bdd69f69697c02b43
+size 13238557