x² + y² = r²
∫ f(x) dx
π ≈ 3.14159
a² + b² = c²
Σ
÷
Δy/Δx
√2
θ
∞
∂f/∂x
lim
∮
dx/dt
∇
e^(iπ)
μ
σ²
P(x)
n!
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