1.\:\:\log_{10}(2)+\log_{10}(5)
                                
                             
                                                    
                                
                                    2.\:\:\log_{10}(2)+\log_{10}(11)+\log_{10}(7)
                                
                             
                                                    
                                
                                    3.\:\:\log_{5}(4\cdot7)+\log_{5}(2)
                                
                             
                                                    
                                                    
                                                    
                                
                                    6.\:\:\log_{10}(\frac{12}{13})+\log_{10}(13)
                                
                             
                                                    
                                
                                    7.\:\:\log_{5}(6)+\log_{5}(\frac{1}{3})+\log_{5}(10)
                                
                             
                                                    
                                
                                    8.\:\:\log_{10}(7)+\log_{10}(\frac{1}{7})
                                
                             
                                                    
                                
                                    9.\:\:\log_{10}(30)+\log_{10}(\frac{1}{10})
                                
                             
                                                    
                                
                                    10.\:\:\log_{4}(11)+\log_{4}(11-6)