Practice:Smriti

latex tutorials $$a\neq~b$$ $$a\geq~b$$ $$a\leq~b$$ $$\hbar$$

$$\Delta$$ $$\delta$$ $$\nabla\pi$$ $$\begin{vmatrix}~2 &~ 3 & ~5\\-2 &-5 & -4\\~2 & ~3 & ~4\end{vmatrix}$$ $$C\longrightarrowO$$

$$\vec{A}$$