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

$\,-3\,x +\,8$ $\,-11\,x +\,4$ $\,-\,x +\,2$ $\,-3\,x \,-4$ $\,-3\,x +\,4$

$ \,5\,x + \,6\,y - ( \,9\,x - \,8\,y)=$ ?

$\,14\,x \,-2\,y$ $\,-4\,x \,-2\,y$ $\,-4\,x +\,2\,y$ $\,14\,x +\,14\,y$ $\,-4\,x +\,14\,y$

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

$\,2\,x +\,7\,y \,-7$ $\,12\,x +\,7\,y +\,7$ $\,12\,x \,-7\,y \,-7$ $\,-2\,x \,-7\,y +\,7$ $\,-2\,x +\,7\,y +\,7$

$\,4\,x - ( - \,6\,\,x^2 - \,5 ) + \,9\,x=$ ?

$\,6\,\,x^2 \,-5\,x +\,5$ $\,6\,\,x^2 +\,13\,x +\,5$ $\,6\,\,x^2 +\,13\,x \,-5$ $\,-6\,\,x^2 +\,13\,x \,-5$ $\,-6\,\,x^2 +\,13\,x +\,5$

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

$\,-\,\,x^2 \,-2\,x \,-8$ $\,3\,\,x^2 +\,2\,x +\,8$ $\,-\,\,x^2 +\,2\,x +\,8$ $\,3\,\,x^2 \,-2\,x \,-8$ $\,-\,\,x^2 +\,2\,x \,-8$

$ \,5\,x - \,7\,\,x^2 - ( - \,3\,\,x^2 + \,7\,x )=$ ?

$\,-4\,\,x^2 +\,12\,x$ $\,10\,\,x^2 \,-2\,x$ $\,-10\,\,x^2 +\,12\,x$ $\,-4\,\,x^2 \,-2\,x$ $\,-10\,\,x^2 \,-2\,x$