- Calculus calculation (e.g. AREA with 4 letters)
- Pre-calculus calculation (AREA with 4 letters)
- Calculus class calculation (AREA with 4 letters)
- Calculus calculations (e.g. AREAS with 5 letters)
- Calculus class calculations (AREAS with 5 letters)
- One working on a calculus problem: Abbr. (DDS with 3 letters)
- Rough calculation: Abbr. (EST with 3 letters)
- Astronomer's calculation: Abbr. (GST with 3 letters)
- Calculus abbr. (LIM with 3 letters)
- GPS calculations: Abbr. (RTES with 4 letters)