Approximate the area under the curve `y=x^2` from `x=1` to `x=4` using a Right Endpoint approximation with 6 subdivisions.
Box 1: Enter your answer as a number (like 5, -3, 2.2172) or as a calculation (like 5/3, 2^3, 5+4)
Enter DNE for Does Not Exist, oo for Infinity