• Support for application in three languages: English, Russian, Ukrainian.

• Theory in the appendix:
— 4 topics: set theory, binary relations, predicate logic, logic of statements.
— proficiency testing: tests and tasks.

• Calculator performs 4 functions:
— union of sets
— the difference of sets
— symmetric of sets
— intersection of sets.

• The matrix
— binary ratio

• Combinatorics
— Arrangement without repetition
— Arrangement with repetitions
— Combination without repetition
— Combination with repetition
— Permutations with repetitions
— Permutations without repetitions


• Graphs
It's in development. At this point, you can only draw a graph.