$$\alpha, \beta, \gamma, \delta, \epsilon, \zeta, \eta, \theta, \iota, \kappa, \lambda, \mu, \nu, \xi, \pi, \rho, \sigma, \tau, \upsilon, \phi, \chi, \psi, \omega, \Gamma, \Delta, \Theta, \Lambda, \Xi, \Pi, \Sigma, \Upsilon, \Phi, \Psi, \Omega, \pm, \times, \div, \neq, \leq, \geq, \approx, \equiv, \sqrt{x}, \frac{a}{b}, \int_{a}^{b}, \sum_{i=1}^{n}, \prod_{j=1}^{m}, \lim_{x \to a}, \sin(x), \cos(x)$$