Срочно, нужно вычислить. Желательно прописывать каждый шаг.

$\frac{log_{2}192 }{log_{12}2} - \frac{log_{2}24 }{log_{96}2}= log_{2}192*log_{2}12 - log_{2}24*log_{2}96= \\ =log_{2}(2*96)*log_{2}12 - log_{2}(2*12)*log_{2}96= \\ = (log_{2}2+log_{2}96)*log_{2}12 - (log_{2}2+log_{2}12)*log_{2}96= \\ =log_{2}2*log_{2}12+log_{2}96*log_{2}12 - log_{2}2*log_{2}96-log_{2}12*log_{2}96= \\ =log_{2}2*log_{2}12- log_{2}2*log_{2}96=log_{2}2*(log_{2}12 - log_{2}96)= \\ = 1 * (log_{2}12 - log_{2}96)= log_{2} \frac{12}{96} = log_{2} \frac{1}{8}=$
..................
$= log_{2}1 - log_{2}8 = 0 - 3 = -3$