Add README

README.md

@@ -2,46 +2,20 @@
 license: gpl-3.0
 pretty_name: Calculator
 size_categories:
-- 10K<n<100K
+  - 10K<n<100K
 task_categories:
-- text-generation
+  - text-generation
 language:
-- en
+  - en
 configs:
-- config_name: default
-  data_files:
-  - split: train
-    path: data/train-*
-  - split: validation
-    path: data/validation-*
-  - split: test
-    path: data/test-*
-dataset_info:
-  features:
-  - name: prompt
-    dtype: string
-  - name: completion
-    dtype: string
-  - name: answer
-    dtype: string
-  - name: expression
-    dtype: string
-  - name: steps
-    dtype: int64
-  - name: text
-    dtype: string
-  splits:
-  - name: train
-    num_bytes: 11115287
-    num_examples: 15000
-  - name: validation
-    num_bytes: 557003
-    num_examples: 750
-  - name: test
-    num_bytes: 2224087
-    num_examples: 3000
-  download_size: 6250337
-  dataset_size: 13896377
+  - config_name: default
+    data_files:
+      - split: train
+        path: data/train-*
+      - split: validation
+        path: data/validation-*
+      - split: test
+        path: data/test-*
 ---
 
 # Arithmetic Expression Dataset Generator
@@ -54,7 +28,11 @@ This is a synthetic deterministic dataset with nested arithmetic expressions and
 - square brackets: `[]`
 - curly braces: `{}`
 
-and operators: `+`, `-`, `*`.
+and operators:
+
+- `+`
+- `-`
+- `*`
 
 The dataset is balanced across reduction depths from 1 to 15 and is intended for SLMs that learn structured mathematical reasoning from examples.
 
@@ -81,32 +59,20 @@ Each step from 1 to 15 appears exactly:
 - 50 times in validation
 - 200 times in test
 
-The symbol-length distribution:
-
-![download](https://cdn-uploads.huggingface.co/production/uploads/6957bafe54c6b170be4df9cb/_IHqukZbgMB6SkZuwtuWY.png)
-
 ## Example
 
 ```text
 ### Expression
-Calculate: {([20 - 9] - 3) * ({[8 + {{2 * 18} - (12 * 19)}] - {(15 * 13) - 12}} + 11)}
+Calculate: (11 + (296 - 98))
 
 ### Answer
 <think>
-Start: {([20 - 9] - 3) * ({[8 + {{2 * 18} - (12 * 19)}] - {(15 * 13) - 12}} + 11)}
-1. (20 - 9) = 11
-2. (11 - 3) = 8
-3. (2 * 18) = 36
-4. (12 * 19) = 228
-5. (36 - 228) = -192
-6. (8 + -192) = -184
-7. (15 * 13) = 195
-8. (195 - 12) = 183
-9. (-184 - 183) = -367
-10. (-367 + 11) = -356
-11. (8 * -356) = -2848
+Start: (11 + (296 - 98))
+1. (74 * 4) = 296
+2. (296 - 98) = 198
+3. (11 + 198) = 209
 </think>
-<answer>-2848</answer>
+<answer>209</answer>
 ```
 
 ## Dataset generation