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 5. [Introduction to matrix analysis](https://eclass.uoa.gr/modules/document/file.php/MATH553/%5BRichard_Bellman%5D_Introduction_to_Matrix_Analysis%2C%28BookFi.org%29.pdf) by Richard Bellman
 6. [Combinatorial mathematics for recreation](https://archive.org/details/VilenkinCombinatorialMathematics) Vilenkin
 7. [Challenhing mathematical problems with elementary solutions, Volume I, Combinatorial Analysis and Probability Theory](https://ia802800.us.archive.org/13/items/ChallengingMathematicalProblemsWithElementarySolutionsVol1DoverYaglomYaglom/Challenging%20Mathematical%20Problems%20with%20Elementary%20Solutions%20Vol%201%20%28Dover%29%20-%20Yaglom%20%26%20Yaglom.pdf) Yaglom & Yaglom
-8. [Collection ofproblems in probability theory](https://gwern.net/doc/statistics/probability/1973-meshalkin-collectionofproblemsinprobabilitytheory.pdf) by Meshalkin
+8. [Collection of problems in probability theory](https://gwern.net/doc/statistics/probability/1973-meshalkin-collectionofproblemsinprobabilitytheory.pdf) by Meshalkin
 9. [Algebra](https://archive.org/details/algebra-gelfand-1) by Gelfand and Shen
-10. [Kolmogorov Complexity and Algorirhmic Randomness](https://www.lirmm.fr/~ashen/kolmbook-eng-scan.pdf) by Shen, Uspensky, Vereschagin
+10. [Kolmogorov Complexity and Algorithmic Randomness](https://www.lirmm.fr/~ashen/kolmbook-eng-scan.pdf) by Shen, Uspensky, Vereschagin
 11. [Mathematical Analysis – A Brief Course For Engineering Students](https://archive.org/details/bermant-aramanovich-mathematical-analysis-a-breif-course-for-engineering-students/page/503/mode/2up) by A.F . Bermant; I. G. Aramanovich
 12. [A Collection of Problems on a Course of Mathematical Analysis](https://www.karlin.mff.cuni.cz/~beckd/MAF/BERMAN%20G.%20N.,%20A%20Collection%20of%20Problems%20on%20a%20Course%20of%20Mathematical%20Analysis.pdf) by Berman
 13. [Higher Mathematics ( Part 1) – for Engineering Students Part 1. Linear Algebra and Fundamentals of Mathematical Analysis](https://archive.org/details/efimov-demidovich-higher-mathematics-part-1-mir-1984)  by A. V. Efimov; B. P. Demidovich