Basic Operations
Standard arithmetic: +, -, ×, ÷, parentheses, decimals
Scientific Functions
Trigonometry: sin, cos, tan (in degrees or radians)
Logarithms: log (base 10), ln (natural log)
Constants: π (pi), e (Euler's number)
Algebra
Variables: x, y, z
Equations: 2x + 3 = 7
Functions: solve, expand, factor, simplify
Geometry
Area: circle, triangle, rectangle
Volume: sphere, cylinder, cube
Distance, midpoint, slope calculations