When you are learning mathematics, it is good to have some help. One of the best tools to use, for Mathematical calculations, you can find here. GeoGebra® have published a visual calculator that is available for everyone to use. It is a lot of fun to test your formulas and see how they show up in a graph.

Go to their page by using this link: https://www.geogebra.org and then Click “Start Calculator”

Here are their terms of service: https://www.geogebra.org/tos

Thus, it is necessary to mention that it is not for commercialisation or for profit use.