$ \,8\,x - \,5\,\,x^2 - ( - \,8\,\,x^2 + \,x )=$ ?

$\,-13\,\,x^2 +\,9\,x$ $\,13\,\,x^2 +\,7\,x$ $\,3\,\,x^2 +\,9\,x$ $\,-13\,\,x^2 +\,7\,x$ $\,3\,\,x^2 +\,7\,x$

$\,5\,x - ( - \,9\,\,x^2 - \,5 ) + \,8\,x=$ ?

$\,9\,\,x^2 +\,13\,x \,-5$ $\,9\,\,x^2 +\,13\,x +\,5$ $\,-9\,\,x^2 +\,13\,x \,-5$ $\,-9\,\,x^2 +\,13\,x +\,5$ $\,9\,\,x^2 \,-3\,x +\,5$

$ \,9\,x + \,6\,y - ( \,3\,x - \,9\,y)=$ ?

$\,6\,x \,-3\,y$ $\,6\,x +\,15\,y$ $\,6\,x +\,3\,y$ $\,12\,x +\,15\,y$ $\,12\,x \,-3\,y$

$\,x + (\,3 - \,3\,x + \,3\,y) =$ ?

$\,4\,x +\,3\,y +\,3$ $\,2\,x +\,3\,y \,-3$ $\,-2\,x +\,3\,y +\,3$ $\,4\,x \,-3\,y \,-3$ $\,-2\,x \,-3\,y +\,3$

$\,3 + ( - \,6\,x + \,6) - ( \,8 - \,3\,x) =$ ?

$\,-3\,x +\,1$ $\,-9\,x +\,1$ $\,-5\,x +\,3$ $\,-3\,x \,-11$ $\,-3\,x +\,17$

$ \,2\,\,x^2 - ( \,9 + \,8\,\,x^2 + \,6\,x)=$ ?

$\,10\,\,x^2 +\,6\,x +\,9$ $\,-6\,\,x^2 +\,6\,x \,-9$ $\,-6\,\,x^2 +\,6\,x +\,9$ $\,10\,\,x^2 \,-6\,x \,-9$ $\,-6\,\,x^2 \,-6\,x \,-9$