Constructions in LaTeX

Constructions in LaTeX are used to construct various parts of an equation such as fraction, vector, integration, square root, etc. Use of LaTeX codes is mandatory to write them.
Some constructions along with their LaTeX codes :

TERM	SYMBOL	LATEX
Wide tilde on abc		\widetilde{abc}
Wide hat on abc		\widehat{abc}
Left arrow on abc		\overleftarrow{abc}
Right arrow on abc		\overrightarrow{abc}
Overline abc		\overline{abc}
Underline abc		\Underline{abc}
Overbrace abc		\Overbrace{abc}
Underbrace		\underbrace{abc}
Square root x		\sqrt{x}
nth root of x		\sqrt[n]{x}
Fraction x/y		\frac{x}{y}
Definite integral from 0 to 1		\int_{0}^{1}
Partial derivative		\frac{\partial u}{\partial v}