The TI 83 is one of the sweetest calculators i have ever seen. I got it 4 years ago and the batteries just recently had to be replaced. It is very helping when figuring out long problems that requires many symbols. I use it most with exponets because it works so easily with those. It is not diffuicult to use at all and i caught on very fast. It even has a cord were u can download new applications and even games. Also if you need to see a graph it is very easy, you just put in the y values and press graph and BAM the graph shows up. I do wish i had a new model of it because i would love to see how...