1) log5 22 - log5 11 - log5 10
2) log3 8 - log3 4 + log3 9/2
[m]log_{5}22-log_{5}11-log_{5}10=log_{5}\frac{22}{11\cdot 10}=log_{5}\frac{1}{5}=-1[/m]
2)
[m]log_{3}8-log_{3}4+log_{3}\frac{9}{2}=log_{3}\frac{8\cdot \frac{9}{2}}{4}=log_{3}9=2[/m]