import math

def main():
    results = {
        "pi": round(math.pi, 10),
        "e": round(math.e, 10),
        "sqrt2": round(math.sqrt(2), 10),
        "factorial20": math.factorial(20),
        "log1000": round(math.log(1000), 10),
    }
    parts = [f"{k}={v}" for k, v in results.items()]
    return "; ".join(parts)