How to use
+ Addition
- Subtraction
* Multiplication

Use the Math method when using special numbers or expressions.
Example: Math.PI or Math.sin(integer).

Arrow key up - copy last expression to input
Esc - instructions

Special numbers
E - Euler's number (2.718)
LN2 - Natural logarithm of 2 (0.693)
LN10 - Natural logarithm of 10 (2.302)
LOG2E - Base-2 logarithm of E (1.442)
LOG10E - Base-10 logarithm of E (0.434)
PI - Value of PI (3.14)
SQRT1_2 - Square root of 1/2 (0.707)
SQRT2 - Square root of 2 (1.414)

Math expressions
abs(x) - Absolute value of x
acos(x) - Arccosine of x, in radians
asin(x) - Arcsine of x, in radians
atan(x) - Arctangent of x as a numeric value between -PI/2 and PI/2 radians
atan2(y,x) - Arctangent of the quotient of its arguments
ceil(x) - Value of x rounded upwards to the nearest integer
cos(x) - Cosine of x (x is in radians)
exp(x) - Value of Ex
floor(x) - Value of x, rounded downwards to the nearest integer
log(x) - Natural logarithm (base E) of x
max(x,y,z,...,n) - Number with the highest value
min(x,y,z,...,n) - Number with the lowest value
pow(x,y) - Value of x to the power of y
random() - Random number between 0 and 1. Example: Math.floor((Math.random()*10)+1)
round(x) - Rounds x to the nearest integer
sin(x) - Sine of x (x is in radians)
sqrt(x) - Square root of x
tan(x) - Tangent of an angle