haha, not a TA but have helped many of my friends in classes and I agree with that last part that you need to understand what a equation does and not just use it because it has what you want and what you have as apart of the equation.
If you need help just try shooting any of them an e-mail to set up an appt. I barely have time to walk the dog anymore between research, classes and TA responsibilities but if a student asks I'll set aside time. Worst that can happen is that they tell you "no."