$\,4 + ( - \,8\,x + \,6) - ( \,6 - \,9\,x) =$ ?

$\,-17\,x +\,4$ $\,x +\,16$ $\,x +\,4$ $\,x \,-8$

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

$\,9\,\,x^2 +\,2\,x$ $\,-5\,\,x^2 +\,8\,x$ $\,-9\,\,x^2 +\,8\,x$ $\,-5\,\,x^2 +\,2\,x$ $\,-9\,\,x^2 +\,2\,x$

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

$\,7\,\,x^2 +\,2\,x \,-6$ $\,7\,\,x^2 +\,2\,x +\,6$ $\,11\,\,x^2 \,-2\,x \,-6$ $\,7\,\,x^2 \,-2\,x \,-6$ $\,11\,\,x^2 +\,2\,x +\,6$

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

$\,-5\,\,x^2 +\,10\,x +\,5$ $\,5\,\,x^2 +\,10\,x \,-5$ $\,-5\,\,x^2 +\,10\,x \,-5$ $\,5\,\,x^2 +\,10\,x +\,5$ $\,5\,\,x^2 \,-6\,x +\,5$

$\,9\,x + (\,7 - \,5\,x + \,6\,y) =$ ?

$\,-4\,x +\,6\,y \,-7$ $\,14\,x +\,6\,y +\,7$ $\,4\,x +\,6\,y +\,7$ $\,14\,x \,-6\,y \,-7$ $\,4\,x \,-6\,y +\,7$

$ \,5\,x + \,2\,y - ( \,3\,x - \,4\,y)=$ ?

$\,2\,x +\,2\,y$ $\,2\,x +\,6\,y$ $\,2\,x \,-2\,y$ $\,8\,x +\,6\,y$ $\,8\,x \,-2\,y$