Learn to estimate areas under curves using Riemann sums in this 30-minute calculus tutorial. Explore techniques for approximating the area under 1/x from 1 to 2 using right and left endpoint approximations (R4 and L4). Compare Riemann sum calculations with the Integral Power Rule for finding the area under y=x^3 from 0 to 1. Practice solving problems related to area calculations using Riemann sums, including specific examples from section 5.1.