| Step | 
						Hyp | 
						Ref | 
						Expression | 
					
						
							| 1 | 
							
								
							 | 
							merco2 | 
							   | 
						
						
							| 2 | 
							
								
							 | 
							mercolem1 | 
							   | 
						
						
							| 3 | 
							
								
							 | 
							mercolem1 | 
							   | 
						
						
							| 4 | 
							
								2 3
							 | 
							ax-mp | 
							   | 
						
						
							| 5 | 
							
								
							 | 
							mercolem5 | 
							   | 
						
						
							| 6 | 
							
								
							 | 
							mercolem4 | 
							   | 
						
						
							| 7 | 
							
								5 6
							 | 
							ax-mp | 
							   | 
						
						
							| 8 | 
							
								4 7
							 | 
							ax-mp | 
							   | 
						
						
							| 9 | 
							
								1 8
							 | 
							ax-mp | 
							   | 
						
						
							| 10 | 
							
								
							 | 
							mercolem1 | 
							   | 
						
						
							| 11 | 
							
								
							 | 
							mercolem1 | 
							   | 
						
						
							| 12 | 
							
								10 11
							 | 
							ax-mp | 
							   | 
						
						
							| 13 | 
							
								
							 | 
							mercolem5 | 
							   | 
						
						
							| 14 | 
							
								
							 | 
							mercolem4 | 
							   | 
						
						
							| 15 | 
							
								13 14
							 | 
							ax-mp | 
							   | 
						
						
							| 16 | 
							
								12 15
							 | 
							ax-mp | 
							   | 
						
						
							| 17 | 
							
								1 16
							 | 
							ax-mp | 
							   | 
						
						
							| 18 | 
							
								9 17
							 | 
							ax-mp | 
							   | 
						
						
							| 19 | 
							
								1 18
							 | 
							ax-mp | 
							   | 
						
						
							| 20 | 
							
								1 19
							 | 
							ax-mp | 
							   | 
						
						
							| 21 | 
							
								1 20
							 | 
							ax-mp | 
							   |