Sometimes one has no choice but to do mathematics to survive the modern jungle. If you miss your old TI89 (do these things still exist?) , 10$man has the solution for you with his entry for the PSP Genesis competition: Autographer.

What is it?

I’ll quote the author here:

• -Factor a list of Polynomials and solve them for 0 (10 polynomials at a time to be exact) BUT you must input them from a computer and it is very inconvenient, can not factor with X multiplied (eg. 2X^2 + 5X + 7) Can do:(eg. X^2 + 5X + 7
• -Factor a single polynomial that you input ON your psp
• -FOIL (or Distribute) it is like un-factoring.
• -Find the Volume and SurfaceArea of:
  Cube
  Rectangular Prisms
  Cylinders
  (More are going to be implemented!)
• -Graph (EXTREMELY in progress)
  Must input equation for line from computer.
  cannot do circles
• -Beneksturun Theorom
  This is something i made with friends a while back
  it is pointless as it states.
  all it does is list every number that can be cubed and have a whole number square

Download

Download here (or alternate link here). You can give your feedback to the author or get updates in the homebrew’s thread here.