Combine advanced symbols with natural language and numbers.

Reduce speed slightly around dense symbol groups and preserve accuracy.

Practice inputs: advanced-symbols

Target: 98.00% accuracy and 40.00 WPM.

Mixed Symbol Assessment Guided Practice: Alert #42: usage reached 87%; review {limits} before 18:00. Queue [A-7] contains 24 items; 3 require approval.

Mixed Symbol Assessment Review: For A/B tests, compare group_1 (n=250) with group_2 (n=275). Record delta=+4.8%, margin<=2%, and status="verified".