42 Providing online non-downloadable software that allows users to navigate and study a digital content library in the field of mathematics; Providing online non-downloadable software for the study of mathematics; Providing online non-downloadable software for the development, production, study, and instruction of mathematics and educational content in the field of mathematics; Development of interactive educational software programs using custom algorithms for operating interactive learning tools, adaptive learning tools, learning assessments, testing, and study programs all in the field of mathematics; Providing temporary use of on-line non-downloadable software and applications using custom algorithms for operating interactive learning tools, adaptive learning tools, learning assessments, testing, and study programs all in the field of mathematics