For adding math symbols I use lpic --- this way you use LaTeX to write over picture,so you can add ALL math symbols NOT just some. BONUS: if you change notation, you do not have to redo picture.

For drawing I often use some geogebra or kig. This soft is mostly designed for compass and straightedge constructions, but I use it as an advanced vector-graphic editor --- it is flexible enough to make virtually any math drawing.

For adding math symbols I use lpic --- this way you use LaTeX to write over picture,so you can add ALL math symbols NOT just some.

For drawing I often use some geogebra or kig. This soft is mostly designed for compass and straightedge constructions, but it is flexible enough to make virtually any math drawing.