]> $$2a+3.5b=c$$ $$\alpha \times \beta \ne \gamma ÷\delta$$ $$x_1+x_2+x_3+\dots$$ $$\sin \left(ax\right)+\cos \left(bx\right)$$ $$\text{matrix A:}A$$ $$a^2+b^4=\sqrt{c}$$ $$\frac{2}{a+b}$$ $$\sum _0^{100}{x}^n$$ $${\int }_0^{t+100}{t}^{2}dt$$ $$\overrightarrow{x}+\overrightarrow{y}=\overrightarrow{z}$$ $$\underset{x\to 0}{\lim }\frac{\sin x}{x}$$ $$$$