There is so many ways.

 

Where I'm from its BIDMAS

Brackets

Indices

Division

Multiply

Addition

Substract

Remember to follow the order of operations.

Parentheses

Exponents

Multiplication

Division

Addition

Subtraction

PEMDAS for short :)

$${\mathtt{7}}{\mathtt{\,\small\textbf+\,}}{\frac{{\mathtt{7}}}{{\mathtt{7}}}}{\mathtt{\,\times\,}}{\mathtt{7}}{\mathtt{\,-\,}}{\mathtt{7}} = {\mathtt{7}}$$