Providing a website featuring non-downloadable educational lessons and information in the field of mathematics and science for children and adults; Providing on-line, non-downloadable videos featuring educational lessons, problem sets and solutions to problem sets in the fields of mathematics, science, computer technology and engineering

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Social networking services in the field of mathematics, science, computer technology and engineering provided via a website

'comput':10 'engin':13 'field':6 'mathemat':8 'network':2 'provid':14 'scienc':9 'servic':3 'social':1 'technolog':11 'via':15 'websit':17

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