(-7)2 + 26 / 5 -11 +13 / 2

$$\left(-{\mathtt{7}}\right){\mathtt{\,\times\,}}{\mathtt{2}}{\mathtt{\,\small\textbf+\,}}{\frac{{\mathtt{26}}}{{\mathtt{5}}}}{\mathtt{\,-\,}}{\mathtt{11}}{\mathtt{\,\small\textbf+\,}}{\frac{{\mathtt{13}}}{{\mathtt{2}}}} = {\mathtt{\,-\,}}{\frac{{\mathtt{133}}}{{\mathtt{10}}}} = -{\mathtt{13.3}}$$

(-7)2 + 26 / 5 -11 +13 / 2

Ok, because of the order of operations we must do the multiplication and division first.

-7*2=-14

26/5=5.2

13/2=6.5

So, -14+5.2-11+6.5

Now we can do the addition and subtraction.

-14+5.2=-8.8

-8.8-11=-19.8

-19.8+6.5=-13.3

The answer to your equation is -13.3