$\,7\,x + (\,6 - \,6\,x + \,6\,y) =$ ?

$\,-\,x +\,6\,y \,-6$ $\,x +\,6\,y +\,6$ $\,13\,x \,-6\,y \,-6$ $\,13\,x +\,6\,y +\,6$ $\,x \,-6\,y +\,6$

$ \,2\,x + \,7\,y - ( \,8\,x - \,4\,y)=$ ?

$\,-6\,x +\,3\,y$ $\,10\,x +\,11\,y$ $\,10\,x +\,3\,y$ $\,-6\,x \,-3\,y$ $\,-6\,x +\,11\,y$

$ \,3\,x - \,2\,\,x^2 - ( - \,\,x^2 + \,4\,x )=$ ?

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

$ \,9\,\,x^2 - ( \,3 + \,2\,\,x^2 + \,5\,x)=$ ?

$\,7\,\,x^2 +\,5\,x \,-3$ $\,11\,\,x^2 \,-5\,x \,-3$ $\,7\,\,x^2 +\,5\,x +\,3$ $\,11\,\,x^2 +\,5\,x +\,3$ $\,7\,\,x^2 \,-5\,x \,-3$

$\,5 + ( - \,3\,x + \,7) - ( \,4 - \,4\,x) =$ ?

$\,4\,x +\,5$ $\,-7\,x +\,8$ $\,x \,-6$ $\,x +\,8$ $\,x +\,16$

$\,8\,x - ( - \,3\,\,x^2 - \,6 ) + \,x=$ ?

$\,-3\,\,x^2 +\,9\,x \,-6$ $\,-3\,\,x^2 +\,9\,x +\,6$ $\,3\,\,x^2 +\,9\,x \,-6$ $\,3\,\,x^2 +\,7\,x +\,6$ $\,3\,\,x^2 +\,9\,x +\,6$