You can enter expressions the same way you see them in your math textbook. Implicit multiplication (5x = 5*x) is supported. If you are entering the integral from a mobile phone, you can also use ** instead of ^ for exponents.

**The following variables and constants are reserved:**

*e*= Euler's number, the base of the exponential function (2.718281...)*i*= imaginary number (*i*² = -1)*pi*, π = the ratio of a circle's circumference to its diameter (3.14159...)*phi*, Φ = the golden ratio (1,6180...)

## Supported differentiation rules

- Sum rule
- Elementary power rule
- Constant factor rule
- Product rule (Leibniz rule)
- Quotient rule
- Chain rule
- Inverse function rule
- Logarithmic derivatives
- Exponential functions
- Trigonometric functions