I just tried the ln(x²) integration example on my ancient TI-68 (built in Feb 1991) - unfortunately the accuracy depends on judicious choice of numerical integr

I just tried the ln(x²) integration example on my ancient TI-68 (built in Feb 1991) - unfortunately the accuracy depends on judicious choice of numerical integration intervals (it uses Simpson's rule). It seemed to give best results with about 25 intervals, taking about 7 seconds to come up with 717.7575466854 (more intervals result in overshooting the correct answer).