Add accepts a procedure with a formula that depends on one integer parameter, say $n$, or two of them, and numerically evaluates the formula adding it from $n=0$ until the result converges with the current value of Digits, or the value $n=10000\mathrm{Digits}$ is reached.

Evalb works as evalb but can handle boolean expressions involving the functions as And, Or, Not and interpreting the integer types integer, posint, negint, nonposint, nonnegint, even and odd in an extended sense to include floats, for example: $1.$ is considered of type integer and $\mathrm{-4.}$ is considered of type negint and even.

GenerateRecurrence accepts a mathematical function (currently working only with the four Appell functions) and returns a procedure to compute the $n$th coefficient of a power series expansion of the given function around the origin as a function of the $n-1$ previous coefficients, where $n$ depends on the function given.

PairwiseSummation accepts a one-dimensional Array or a procedure of one argument, say $U$ and performs a pairwise summation of $U\left(j\right)$ for $j$ from given m to n, or from the lower to the upper bound of the given Array. Pairwise summation is a technique to add floating-point numbers that significantly reduces the accumulated round-off error if compared to adding the numbers one at a time.

QuadrantNumbers accepts a complex number and returns the quadrant of the complex plane where the number is located, or it accepts a list of numbers, and returns an Array of four lists, corresponding to each quadrant, of random complex numbers that are around the numbers indicated.

Singularities accepts a Heun or Appell function, for instance with numerical values for the function's parameters, and returns the singularities of the linear ODE satisfied by the given function.

Zoom is used to zoom within the last plot computed using Evalf for concatenated Taylor expansions used when performing numerical computations of Heun or Appell functions.

As usual, you can load the Evalf package using the with command, or invoke Evalf commands using the long form, e.g. as in Evalf:-Add.