$\,5 + ( - \,5\,x + \,7) - ( \,9 - \,3\,x) =$ ?

$\,-2\,x +\,3$ $\,-8\,x +\,3$ $\,-2\,x \,-11$ $\,-2\,x +\,21$ $\,-4\,x +\,5$

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

$\,-\,x +\,10\,y$ $\,3\,x \,-8\,y$ $\,-\,x \,-8\,y$ $\,-\,x +\,8\,y$ $\,3\,x +\,10\,y$

$ \,9\,x - \,3\,\,x^2 - ( - \,6\,\,x^2 + \,2\,x )=$ ?

$\,9\,\,x^2 +\,7\,x$ $\,-9\,\,x^2 +\,11\,x$ $\,3\,\,x^2 +\,7\,x$ $\,-9\,\,x^2 +\,7\,x$ $\,3\,\,x^2 +\,11\,x$

$\,5\,x + (\,1 - \,3\,x + \,9\,y) =$ ?

$\,-2\,x +\,9\,y \,-1$ $\,8\,x +\,9\,y +\,1$ $\,8\,x \,-9\,y \,-1$ $\,2\,x +\,9\,y +\,1$ $\,2\,x \,-9\,y +\,1$

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

$\,2\,\,x^2 +\,3\,x +\,5$ $\,2\,\,x^2 +\,15\,x +\,5$ $\,-2\,\,x^2 +\,15\,x +\,5$ $\,2\,\,x^2 +\,15\,x \,-5$ $\,-2\,\,x^2 +\,15\,x \,-5$

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

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