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

$\,-4\,x \,-7\,y$ $\,8\,x +\,7\,y$ $\,-4\,x +\,11\,y$ $\,8\,x +\,11\,y$ $\,-4\,x +\,7\,y$

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

$\,5\,\,x^2 \,-8\,x +\,6$ $\,5\,\,x^2 +\,10\,x \,-6$ $\,5\,\,x^2 +\,10\,x +\,6$ $\,-5\,\,x^2 +\,10\,x +\,6$ $\,-5\,\,x^2 +\,10\,x \,-6$

$ \,8\,\,x^2 - ( \,7 + \,6\,\,x^2 + \,8\,x)=$ ?

$\,2\,\,x^2 \,-8\,x \,-7$ $\,2\,\,x^2 +\,8\,x \,-7$ $\,2\,\,x^2 +\,8\,x +\,7$ $\,14\,\,x^2 \,-8\,x \,-7$ $\,14\,\,x^2 +\,8\,x +\,7$

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

$\,5\,x \,-6\,y \,-3$ $\,5\,x +\,6\,y +\,3$ $\,x +\,6\,y \,-3$ $\,-\,x +\,6\,y +\,3$ $\,-\,x \,-6\,y +\,3$

$ \,6\,x - \,7\,\,x^2 - ( - \,\,x^2 + \,4\,x )=$ ?

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

$\,6 + ( - \,3\,x + \,5) - ( \,2 - \,x) =$ ?

$\,-2\,x \,-1$ $\,-4\,x +\,9$ $\,-2\,x +\,9$ $\,-2\,x +\,13$ $\,x +\,6$