A necessary APP for college students to do problems.

This software contains the answers to the after-school exercises of all university courses, not only the answers of textbooks, but also the answers of online courses.

2. Learning is small and easy.

A comprehensive search APP.

Similar to the teaching AIDS mentioned above, you can also search the answers of textbooks and online courses.

3. Symbol laboratory

An APP that focuses on solving the problem of high numbers.

Can solve calculus, function, matrix, geometry and other complex problems with high numbers. There will be many small categories under each category.

4. Volfram Alpha

A very intelligent knowledge search library.

It covers many fields, including mathematics, science, society and daily life. Under each category, there are corresponding subcategories.