Math plus ultra is a graphing programable calculator with a large set of functions that features:

-The manipulation of numeric and symbolic expressions.
-The development of customized functions.
-The creation of 2D and 3D graphs, including plots, contours and surfaces.
-Matrix and complex calculus.
-Integration and differentiation of numeric and symbolic functions.

Resources:

Website:
https://math.innovador.co/en/general-description/

guide:
https://math.innovador.co/en/-manual/

Numeric functions (reference):
https://math.innovador.co/en/numeric-catalog/

Symbolic functions (reference)
https://math.innovador.co/en/symbolic-catalog/

General of use –
https://math.innovador.co/en//