Sorry for the long delay between versions, but here is graphDS v0.8! I think that you'll find it worth the wait. I made some pretty substantial additions, so please download. Additions/changes: -Two new graph modes: slope field and Euler's method. -Added a CAS to simplify algebraic expressions, including foiling -Increased calculation and graphing speed by 2.5x -Made function nIntegrate faster and more accurate -Added new catalog functions for approximating definite integrals: euler, monteCarlo, simpson, trapezoid Download: graphDS v0.8 You can find more info at my site. If you like graphDS and want to help me pay for college, you can make a donation.