Initial upload of expert (level 6,7) math dataset

Math dataset containing 14,000 examples from the expert (level 6,7) 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: 13693160
+    num_examples: 14000
+  download_size: 4646451
+  dataset_size: 13693160
+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 sha256:48ce5454d19612bc35b09661980ec4d7e8f3c1b2ebbbb2d806ccdb02394f76f8
+size 4646451