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f(x) = x² + 2x + 1
sin(θ) = opp/hyp
logₐ(b) = c
∫f(x)dx = F(x) + C
lim(x→0) sin(x)/x = 1
e^(iπ) + 1 = 0
d/dx[e^x] = e^x
cos²(θ) + sin²(θ) = 1