AgentSkillsCN

calculate

使用SymPy对数学表达式进行数值求解

SKILL.md
--- frontmatter
name: calculate
type: python
description: "Numerically evaluate mathematical expressions using SymPy"

calculate

Evaluate mathematical expressions numerically using SymPy. Returns floating-point results.

Input

  • •value: Mathematical expression as string (required)
  • •variables: Dictionary of variable substitutions (optional, numbers only)
  • •precision: Decimal places for evaluation (optional, default: 10)

Output

Success (status: "success"):

  • •value: String representation of numeric result

Failure (status: "failed"):

  • •reason: Error description

Behavior

  • •Operators: +, -, *, /, **, %
  • •Constants: pi, E
  • •Functions: sin, cos, tan, asin, acos, atan (radians), sqrt, log, ln, exp, abs, factorial
  • •Equations: Expressions with = are solved (e.g., x**2 - 4 = 0 → -2.0, 2.0)
  • •All trig functions expect radians

Planning Notes

  • •Use for reliable arithmetic (LLM arithmetic is unreliable)
  • •To convert result to integer, use coercion tool afterward

Examples

json
{"type":"calculate","value":"2 + 3 * 4","out":"$result"}
{"type":"calculate","value":"2 * v * sin(theta * pi / 180) / g","variables":{"v":20,"theta":30,"g":9.8},"out":"$time"}
{"type":"calculate","value":"x**2 - 4 = 0","out":"$roots"}