All Necessary Math Formulas and Equations.
The app includes:

Algebra formulas

Set identities
Sets of numbers
Complex numbers
Factoring and product
Algebraic equations

Functions formulas

Exponents Formulas
Roots Formulas
Logarithm Formulas
Trigonometry Formulas
Hyperbolic functions

Analytic geometry

Lines in 2D
Triangles in 2D
Circle
Conic Sections
Lines in 3D
Planes in 3D

Limits and Derivatives

Limits
Common Derivatives
Higher-order Derivatives

Indefinite integrals

Common Integrals
Rational Integrals
Exponential Integrals
Logarithmic Integrals
Trigonometric Integrals

Definite integrals

Rational functions
Trigonometric functions
Exponential functions
Logarithmic functions

Series formulas

Arith. and Geom. Series
Power Series
Taylor Series

The homepage includes some more commonly used formulas in different tab.

Kindly inform me if i missed any important formula that should be in the app.