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Color A – Specifies the first color/texture.

Mult A – A multiplier for Color A.

Color B – Specifies the second color/texture.

Mult B – A multiplier for Color B.

Result Alpha – Determines a value that overrides the alpha value in the output.

Mode – Specifies the calculation method for the two colors/textures:

Result A – Returns the value of A (color_a*mult_a)
Result B – Returns the value of B

(color_b*mult_b)
Product – Performs a multiplication operation and returns the product (A*B).
Sum – Performs an addition operation and returns the sum (A+B).
Difference – Performs a subtraction operation and returns the difference (A-B).
Power – Performs an exponentiation operation and returns the power (A^B).
Division – Performs a division operation and returns the quotient (A/B).
Minimum – Performs a comparison and returns the minimum value.
Maximum – Performs a comparison and returns the maximum value.
Absolute Difference – Performs a subtraction operation and returns the difference as an absolute value (abs(A-B)).
Lower Intensity Color – Returns the value of whichever Color parameter has the lowest intensity.
Greater Intensity Color – Returns the value of whichever Color parameter has the greatest intensity.  
Sin – Performs a sine function and returns the result (sin(A)).
Cos – Performs a cosine function and returns the result (cos(A)).
Abs – Returns the absolute value of the first argument (abs(color_a*mult_a)
Ceil – Performs a ceiling function that rounds up to the next integer that is equal to or greater than the largest argument - A or B (ceil(A)); (ceil(B)).
Exp – Performs an exponential function (e^a+b).
Floor – Performs a floor function that rounds down to the next integer that is equal to or smaller than the smallest argument - A or B (floor(A)); (floor(B)).
Log – Performs a natural logarithmic function (ln(A)).
Log 10 – Performs a common logarithmic function (base 10) on the first argument (log(A)).
Sqrt – Performs a square root function (√A).
Fmod – Performs a division operation and returns the remainder (A%B). 
Average – Returns the average of A and B (((color_a*mult_a)+(color_b*mult_b))/2)
Tan – Performs a tangent function and returns the result (tan(A.0)).
Asin – Performs an arcsine function and returns the result (asin(A).
Acos – Performs an arccosine function and returns the result (acos(A)).
Atan – Performs an arctangent function and returns the result (atan(A)).
Atan 2 – Performs an arctangent function with two arguments and returns the result (atan2(A,B)).
Bias Schlick – Performs a faster bias approximation, described by Christophe Schlick, based on the original definition by Kenneth Perlin.¹
Gain Schlick – Performs a faster gain approximation, described by Christophe Schlick, based on the original definition by Kenneth Perlin.²
Bias Perlin – Implements the original bias definition by Kenneth Perlin.³
Gain Perlin – Implements the original gain definition by Kenneth Perlin.⁴