The CALC 1 formula calculators are dedicated to a single formula with store, recall and solve keys for each parameter as well as the result. You can also easily create a graph of the formula by entering the range and selecting the independent variable.
If there is a formula calculator that you would like to be included, please use the contact form to request it. It would help a great deal if you can provide the formula and test examples. A link to a web site usually works.