TeX Quellcode:

\begin{array}{ccl} \log_b(10y)-\log_b(5y^2)+\log_c\left(\dfrac{y}{100}\right)+\log_b(2^{-1}) &=& \log_b\left(\dfrac{10y}{5y^2 \cdot 2}\right)+\log_c\left(\dfrac{y}{100}\right) \cr\cr &=& \log_b\left(\dfrac{1}{y}\right)+\log_c\left(\dfrac{y}{100}\right) \cr\cr &=& -\log_b(y)+\log_c(y)-\log_c(100) \end{array}