Design of Subtractors

I am an Electrical Engineer having specialization in Electronics and Control, teaching in Electrical Department at FAST National University Pakistan. I am also per-suing my MS degree in Electrical Engineering with specialization in CONTROL. I have taught the followings courses, and also done many projects related to these subjects as well as related to consumer electronics products. 1. Control System Design & Modelling (Matlab & Simulink) 2. Digital Logic Design (Verilog, VHDL, Logisim) 3. Digital System Design (Verilog, VHDL, Logisim) 4. Computer organization & Assembly Language (8086 processor, 8051 controller, Arduino, PIC) 5. Electric Machines Design and Analysis 6. Circuit Analysis and Designe etc 7. PCB Design (Proteous AREAS + Multisim Ultiboard + Altium Designer) I assure you, if you assign your project to me, you surely gonna work with me in future.