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From Programmatic Magic:
PolySolve is a handy application designed to solve polynomial equations. Unlike the competition, it is capable of solving all kinds of polynomial equations, not just quadratic or cubic, using the JenkinsTraub algorithm.Features: - An intuitive way to enter equations: readable formatting, easy to use keyboard. - Can handle positive and negative exponents alike - Polynomials don't have to be in any sequence - Polynomials need not have unique exponents, the application can handle their addition and subtraction - Provides all solutions, both complex and real - Lightning-fastForget about cheap calculators and manual labor, use PolySolve!