I teach in Russian, English and French. The main areas of my work are mathematics and computer science at the extracurricular level. I see beauty in mathematics and try to convey it to the student, and I also believe that even the most difficult topic can always be explained in such a way that it will become clear to anyone. That is why, in addition to scientific activity, I am engaged in writing books on Olympiad mathematics. Subjects: Mathematics, Higher Mathematics, Mathematical Analysis, Differential Calculus, Integral Calculus, Linear Algebra, Differential Equations, Analytical Geometry, Probability Theory, Vector Calculus, Discrete Mathematics, Combinatorics, Graph Theory, Boolean Algebra, Algorithm Theory, Coding Theory, Complex Analysis, Mathematical Logic, Higher Algebra, Series Theory, Mathematical Physics Equations, Number Theory, Algebra, Group Theory, Geometry, Planimetry, Stereometry, Elementary Mathematics, Trigonometry, Mathematics Olympiads, Logic, AP Calculus AB, AP Calculus BC, Interesting puzzles, Computer Science, Computer Science Olympiads, Mathematical Modeling Systems, Matlab, Wolfram Mathematica, Data science, SAT, GMAT, Machine learning, Sports Programming