bez123 – Sup­port for Bezier curves

Pro­vides ad­di­tional fa­cil­i­ties in a pic­ture en­vi­ron­ment for draw­ing lin­ear, cu­bic, and ra­tio­nal quadratic Bezier curves (stan­dard LaTeX only of­fers non-ra­tio­nal quadratic splines). Pro­vides a pack­age mul­ti­ply that pro­vides a com­mand for mul­ti­pli­ca­tion of a length with­out nu­mer­i­cal over­flow.