Calculate the slope and equation of a line between two points.
Calculate nCr -- the number of unordered selections of r items from n.
Calculate base raised to any exponent, including negative and fractional powers.
Solve ax + b = c for x instantly.
Calculate the percentage increase or decrease between two values.
Calculate the logarithm of any value to any base.
Calculate n! (n factorial) for any non-negative integer.
Solve ax² + bx + c = 0 for x using the quadratic formula, including complex roots.
Calculate nPr -- the number of ordered arrangements of r items from n.