Factoring Factoring is a fundamental skill that improves the sketching of graphs, and the simplification of problems. Expressions A thorough understanding of Algebra is an essential skill for anyone studying higher mathematics. Equations and inequalities Another widely used skill, frequently needed in a wide range of business and science applications. Exponents and logarithms These skills are used regularly in calculus applications, and so a thorough knowledge of them is useful. Simultaneous equations Studying matrices and their properties is important in trying to improve efficiency in the solving of a system of equations.