[Solved] Find the indefinite integral. \[\int 3 x \left( 5 x ^ { 2 } + 3 \right) ^ { 6 } d x\] Peaks Early: Refers to something that reaches its highest or most intense point of development, performance, or activity at an early stage. Self-Serving Bias: The common tendency to attribute one's successes to personal factors and one's failures to external factors. Collectivist Societies: Societies or cultures that prioritize the group over the individual, focusing on communal goals and shared responsibilities. Cultural Variations: The differences in beliefs, behaviors, and social norms among various cultures, influenced by geographical, historical, and sociopolitical factors.