$\frac{\mathrm{i\_app}-\mathrm{i\_Na}+\mathrm{i\_Ca\_L}+\mathrm{i\_Ca\_T}+\mathrm{i\_K\_dr}+\mathrm{i\_M}+\mathrm{i\_ir}+\mathrm{i\_d}}{\mathrm{Cm}}$ $\mathrm{g\_Na}O(V-\mathrm{V\_Na})$ $A^3$ $\mathrm{alpha}D+\mathrm{k1\_}\mathrm{A\_}-\mathrm{beta}A+\mathrm{k1}A$ $\mathrm{alpha}a\mathrm{D\_}+\mathrm{k1}A-\frac{\mathrm{beta}}{a}\mathrm{A\_}+\mathrm{k1\_}\mathrm{A\_}$ $\mathrm{beta}A+\mathrm{k2\_}\mathrm{D\_}-\mathrm{alpha}D+\mathrm{k2}D$ $\frac{\mathrm{beta}}{a}\mathrm{A\_}+\mathrm{k2}D-\mathrm{alpha}a\mathrm{D\_}+\mathrm{k2\_}\mathrm{D\_}$ $\frac{10}{1+e^{\frac{-(V+6)}{10}}}$ $\frac{10}{1+e^{\frac{V+54.4}{4.6}}}$ $\sqrt{\frac{\mathrm{k1}\mathrm{k2\_}}{\mathrm{k1\_}\mathrm{k2}}}$ $\frac{\mathrm{m\_infinity}-m}{\mathrm{tau\_m}}$ $\frac{1}{1+e^{\frac{-(V-\mathrm{Vh})}{12}}}$ $\frac{5}{e^{\frac{V+15}{25}}+e^{\frac{-(V+15)}{25}}}$ $\mathrm{g\_Ca\_L}m^2(V-\mathrm{V\_Ca})$ $\frac{\mathrm{m\_infinity}-m}{\mathrm{tau\_m}}$ $\frac{1}{1+e^{\frac{-(V-56.1)}{10}}}$ $\frac{7}{e^{\frac{V+50}{9}}+e^{\frac{-(V+50)}{9}}}+0.8$ $\frac{\mathrm{h\_infinity}-h}{\mathrm{tau\_h}}$ $\frac{1}{1+e^{\frac{V+86.4}{4.7}}}$ $\mathrm{g\_Ca\_T}m^{2}h(V-\mathrm{V\_Ca})$ $\frac{\mathrm{n\_infinity}-n}{\mathrm{tau\_n}}$ $\frac{1}{1+e^{\frac{-(V+25)}{15}}}$ $\frac{15}{e^{\frac{V+30}{15}}+e^{\frac{-(V+30)}{15}}}+1$ $\frac{\mathrm{h\_infinity}-h}{\mathrm{tau\_h}}$ $\frac{0.7}{1+e^{\frac{-(V+35)}{10}}}+0.3$ $\mathrm{g\_K\_dr}n^{4}h(V-\mathrm{V\_K})$ $\frac{\mathrm{n\_infinity}-n}{\mathrm{tau\_n}}$ $\frac{1}{1+e^{\frac{-(V+37)}{4}}}$ $\frac{80}{e^{\frac{V+30}{15}}+e^{\frac{-(V+30)}{15}}}$ $\mathrm{g\_M}n(V-\mathrm{V\_K})$ $\frac{0.8\times 1}{1+e^{\frac{V+80}{12}}}+0.2$ $\mathrm{g\_ir}\mathrm{n\_infinity}(V-\mathrm{V\_K})$ $\mathrm{g\_d}(V-\mathrm{V\_Ca})$