Add adds two uint64s and errors if there is an overflow.

Div divides two uint64s and throws errors if there are problems.

DivMod calculates the quotient and the remainder of dividing a by b, returns both, and and returns errors if there are issues.

ExpFrac calculates e^x, where x is a fraction numerator/denominator between 0 and 1.

LnInt computes the floor of the natural logarithm of its input.

Mod calculates the remainder of dividing a by b and returns errors if there are issues.

Mul multiplies two uint64s and errors if there is an overflow.

MulDiv multiplies a uint64 value by the ratio n/d without overflowing the uint64, provided that the final result does not overflow.

Sub adds two uint64s and errors if there is an overflow.