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

$\,10\,\,x^2 \,-8\,x \,-6$ $\,8\,\,x^2 \,-8\,x \,-6$ $\,8\,\,x^2 +\,8\,x +\,6$ $\,8\,\,x^2 +\,8\,x \,-6$ $\,10\,\,x^2 +\,8\,x +\,6$

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

$\,-2\,\,x^2 +\,7\,x \,-8$ $\,2\,\,x^2 \,-5\,x +\,8$ $\,2\,\,x^2 +\,7\,x \,-8$ $\,2\,\,x^2 +\,7\,x +\,8$ $\,-2\,\,x^2 +\,7\,x +\,8$

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

$\,8\,x +\,4\,y +\,5$ $\,2\,x +\,4\,y \,-5$ $\,-2\,x +\,4\,y +\,5$ $\,8\,x \,-4\,y \,-5$ $\,-2\,x \,-4\,y +\,5$

$ \,4\,x - \,8\,\,x^2 - ( - \,4\,\,x^2 + \,5\,x )=$ ?

$\,-4\,\,x^2 +\,9\,x$ $\,12\,\,x^2 \,-\,x$ $\,-12\,\,x^2 \,-\,x$ $\,-12\,\,x^2 +\,9\,x$ $\,-4\,\,x^2 \,-\,x$

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

$\,7\,x +\,3\,y$ $\,-5\,x +\,9\,y$ $\,7\,x +\,9\,y$ $\,-5\,x \,-3\,y$ $\,-5\,x +\,3\,y$

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

$\,-2\,x +\,11$ $\,-2\,x \,-7$ $\,-2\,x +\,25$ $\,-4\,x +\,11$