\startformula \widehat{bcd} \ \widetilde{efg} \ \dot A \ \dot R \ {\bi\dot A \check t} \ \check{\cal A} \check{\cal a} \ \mathbf{\acute \imath} \stopformula %Angle brackets: \startformula \langle a \rangle \left\langle \frac{a}{b} \right\rangle \left\langle \frac{\frac{a}{b}}{c} \right\rangle \stopformula %Big operators: \startformula (x + a)^n = \sum_{k=0}^n {n \choose k} x^k a^{n-k} \stopformula %%Horizontal brackets: \startformula \underbrace{\overbracket{aaaaaaa}}_{\rm Siedém} \underbrace{\overparent{aaaaa}}_{\rm pięć} \stopformula %Squares: \startformula \sqrt{\sqrt{\sqrt{\sqrt{\sqrt{\sqrt{2}}}}}} = \frac{\sqrt{\sqrt{\sqrt{\sqrt{\sqrt{\sqrt{\sqrt{\sqrt{2}}}}}}}}}{\frac{2}{3}} \stopformula %Cardinal numbers \startformula \aleph_{0}<2^{\aleph_0}<2^{2^{\aleph_0}} \stopformula %Powers \startformula x^{\alpha} e^{\beta x^{\gamma} e^{\delta x^{\epsilon}}} \stopformula %Integrals \startformula \oint_C\mathbf{F}\cdot d\mathbf{r}=\int_S\mathbf{\nabla}\times\mathbf{F}\cdot d\mathbf{S}\qquad \oint_C\vec{A}\cdot\vec{dr}=\iint_S(\nabla\times\vec{A})\,\vec{dS} \stopformula %Sum \startformula (1+x)^n=1+\frac{nx}{1!}+\frac{n(n-1)x^2}{2!}+\cdots \stopformula %Equations \startformula \startmathalignment \int_{-\infty}^\infty e^{-x^2}dx \NC =\NC \left[\int_{-\infty}^\infty e^{-x^2}dx \int_{-\infty}^\infty e^{-y^2}dy\right]^{1/2} \NR \NC =\NC \left[\int_{0}^{2\pi} \int_0^\infty e^{-r^2}r\,dr\,d\theta\right]^{1/2}\NR \NC =\NC \left[\pi\int_{0}^\infty e^{-u}du\right]^{1/2}\NR \NC =\NC \sqrt{\pi} \stopmathalignment \stopformula \endinput