Find the derivative of the function. 
Definitions:
Lev Vygotsky
A Russian psychologist known for his work on cognitive development, particularly the socio-cultural theory which emphasizes the role of social interaction in the development of cognition.
Cognitive Development
The construction of thought processes, including remembering, problem-solving, and decision-making from childhood through adolescence to adulthood.
Moral Development
The process through which individuals develop proper attitudes and behaviors toward other people in society, based on social and cultural norms, laws, and personal beliefs.
Emotional Attachment
The emotional bond that forms between individuals, influencing their relationships and behaviors towards each other.
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