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$\sum_{i=0}^n i^2 = \frac{(n^2+n)(2n+1)}{6}$

$$\sum_{i=0}^n i^2 = \frac{a}{b}$$

$$\sum_{i=0}^n i^2 = \frac{(n^2+n)(2n+1)}{6}$$

$$\sum_{j-0}^m j^2 + j^3 \frac{a+b}{c+d}$$

$$\alpha \beta \omega \Gamma \Delta \Omega$$

$$x_i^2 \log_2 x$$

$$\sum_{i=0}^\infty i^2$$

$$\prod_0^5 i^2$$

$$\int_0^3$$

$$\lim_{x\to 0}$$

$$\infty$$

$$\partial$$

$$\begin{matrix} 1 & x & x^2 \\ 1 & y & y^2 \\ 1 & z & z^2 \\ \end{matrix}$$

$$d(H_1,H_2) = \frac{\sum_i (H_1(I) - \bar{H_1})(H_2(I) - \bar{H_2})}{\sqrt{\sum_I(H_1(I) - \bar{H_1})^2\sum_I(H_2(I) - \bar{H_2})^2}}$$