Many Precalculus Topics are listed under Algebra. Under Precalculus, I'm basically listing topics that would not be done in a Beginning or Intermediate Algebra class.
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Conic Sections-Parabolas, Circles, Ellipses, Hyperbolas
Derivative and Tangent Line (using slope and limits)
Nonlinear Systems of Equations
Polynomials - Roots, Zeroes of Polynomial, Rational Root Theorem, etc.