Math lesson: Mathematics

Almost all Mathematics topics are covered in this app such as
Arithmetic
Algebra
Geometry
Trigonometry
Calculus
Probability and Statistics
Number Theory
Topology
Integers
Fraction
Decimal
Linear Equations
Quadratic equations
Logarithm
Antilogarithm
Sequences and Series

With worked out examples.
This app is useful irrespective of your location-
Ho chi minh, Saint Petersburg, Hangzhou, Ahmedabad, Nanjing, Xi an, Chennai,
Dongguan, Dalian, Jinan, Wuhan, Tianjin, Hyderabad, Lahore, Bogota, Chengdu,
Harbin, Shenyang, Osaka, Seoul, Rio de Janeiro, Guangzhou, Kinshasa, Dallas,
Buenos Aires, Shenzhen, Bengaluru, Rome, Tehran, London, Manila, Istanbul, Karachi,
Cairo, Chicago, Lagos, Houston, Kolkota, Moscow, Osaka, Tokyo, New York, Mumbai,
Mexico City, Beijing, Shanghai, Los Angeles, Jakarta, Dhaka, Sao Paulo, Chongqing