HP49 Equation Writer is one of the most powerfull resourses of HP49. It permits write compklexes equations as you write them in the paper. You can write symbolic and numerical expressions. HP49 also offers option to expand binomial expressions and see previos expressions you put in the stack.

Symbolic expression can easily be written in HP49 equation writer. The softkey BIG, actived by F3, permits to see the equation in two sizes, BIG or short.

The Equation Writer is accesssed by the key and can easily be created and operated. It is just needed you type the expression and the arrow sets.

For example in the picture at left, when the expression 6.p is painted of black it means you are able to work with it and can sum, divide, multiply it. To do it just press the operator (+, -, / , x, log, y^x) or other. HP49 insert automatically parentesis "( )" when needed. In HP49 Equation Writer everytime a part is painted of black it means it is the part of equation you can work on it. Press arrow sets to mark the equation and the mathematical operator to continue. This resourse of HP49 Equation Writer permits you know the part of equation you are working on it, go back and forward and correct the eqaution or also insert new parts needed. The command EDITpermits you to correct the part of the equation painted of black.

Cursor

The softkey CURS puts the cursor in the part of the equation you wish.   It can be used to easily go to a part of the equation that needs to be edited.   Press [F2], to access it and [EXE] to exit.