is_canonical() Return

next_toward(x, y) Returns the number closest to x, in direction towards y.

math.tan(x) Return the tangent of x radians.

random.expovariate(lambd) Exponential distribution. lambd is 1.0 divided by the desired mean. It should be nonzero

math.atan(x) Return the arc tangent of x, in radians.

to_integral_exact(x) Rounds to an integer.

copy_negate() Return the negation of the argument. This operation is unaffected by the context and is quiet: no flags are changed

canonical(x) Returns the same Decimal object x.

math.isnan(x) Return True if x is a NaN (not a number), and False otherwise.

same_quantum(other, context=None) Test whether self and other have the same exponent or whether both are NaN.