f(x)=x²

∫₀^∞ e^-x dx = 1

a² + b² = c²

lim x→0 (sin x / x) = 1

e^iπ + 1 = 0

∑_n=1^∞ 1/n² = π²/6

∇ · E = ρ / ε₀

f(x) = 1 / (1 + x²)

A = πr²

det(A - λI) = 0

P(A ∩ B) = P(A)P(B)

∂u/∂t = α∂²u/∂x²

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