On the design of life

\begin{align} \label{eq:r1} &\ce{\textit{\color{blue}m} + \textit{\color{red}s} <=>[k_{1,s}][k_{-1,s}] $c_{ms}$ ->[k_{2,s}]} (1 - p_s) {\color{red}s} \\ \label{eq:r2} &\ce{\textit{\color{red}s} + \textit{\color{green}r} <=>[k_{1,r}][k_{-1,r}] $c_{sr}$ ->[k_{2,r}]} (1-p_r) {\color{green}r} \end{align}

\begin{align} a &= b \\ a &= \frac{x}{h} \end{align}

\begin{eqnarray} y & = & ax^2 + bx + c \\ f(x) & = & x^2 + 2xy + y^2 \label{test} \end{eqnarray} \ref{test}