$ \,6\,x - \,2\,\,x^2 - ( - \,8\,\,x^2 + \,5\,x )=$ ?

$\,10\,\,x^2 +\,x$ $\,-10\,\,x^2 +\,11\,x$ $\,6\,\,x^2 +\,x$ $\,6\,\,x^2 +\,11\,x$ $\,-10\,\,x^2 +\,x$

$ \,3\,\,x^2 - ( \,1 + \,8\,\,x^2 + \,9\,x)=$ ?

$\,11\,\,x^2 \,-9\,x \,-1$ $\,-5\,\,x^2 +\,9\,x \,-1$ $\,11\,\,x^2 +\,9\,x +\,1$ $\,-5\,\,x^2 +\,9\,x +\,1$ $\,-5\,\,x^2 \,-9\,x \,-1$

$\,3\,x - ( - \,6\,\,x^2 - \,3 ) + \,9\,x=$ ?

$\,6\,\,x^2 +\,12\,x \,-3$ $\,6\,\,x^2 \,-6\,x +\,3$ $\,-6\,\,x^2 +\,12\,x \,-3$ $\,6\,\,x^2 +\,12\,x +\,3$ $\,-6\,\,x^2 +\,12\,x +\,3$

$\,9 + ( - \,7\,x + \,2) - ( \,3 - \,6\,x) =$ ?

$\,-\,x +\,8$ $\,-\,x +\,14$ $\,-2\,x +\,9$ $\,-\,x +\,4$ $\,-13\,x +\,8$

$\,x + (\,4 - \,3\,x + \,8\,y) =$ ?

$\,2\,x +\,8\,y \,-4$ $\,4\,x \,-8\,y \,-4$ $\,4\,x +\,8\,y +\,4$ $\,-2\,x \,-8\,y +\,4$ $\,-2\,x +\,8\,y +\,4$

$ \,3\,x + \,8\,y - ( \,7\,x - \,2\,y)=$ ?

$\,-4\,x +\,10\,y$ $\,-4\,x +\,6\,y$ $\,-4\,x \,-6\,y$ $\,10\,x +\,10\,y$ $\,10\,x +\,6\,y$