$\,2\,x + (\,3 - \,7\,x + \,4\,y) =$ ?

$\,-5\,x +\,4\,y +\,3$ $\,9\,x +\,4\,y +\,3$ $\,5\,x +\,4\,y \,-3$ $\,-5\,x \,-4\,y +\,3$ $\,9\,x \,-4\,y \,-3$

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

$\,-3\,\,x^2 +\,2\,x$ $\,-3\,\,x^2 +\,8\,x$ $\,-7\,\,x^2 +\,8\,x$ $\,7\,\,x^2 +\,2\,x$ $\,-7\,\,x^2 +\,2\,x$

$ \,5\,\,x^2 - ( \,1 + \,2\,\,x^2 + \,6\,x)=$ ?

$\,3\,\,x^2 \,-6\,x \,-1$ $\,7\,\,x^2 +\,6\,x +\,1$ $\,7\,\,x^2 \,-6\,x \,-1$ $\,3\,\,x^2 +\,6\,x \,-1$ $\,3\,\,x^2 +\,6\,x +\,1$

$\,4\,x - ( - \,\,x^2 - \,8 ) + \,3\,x=$ ?

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

$\,4 + ( - \,6\,x + \,4) - ( \,1 - \,3\,x) =$ ?

$\,-3\,x +\,9$ $\,-3\,x \,-1$ $\,-9\,x +\,7$ $\,-3\,x +\,7$

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

$\,15\,x +\,8\,y$ $\,-3\,x +\,8\,y$ $\,15\,x +\,10\,y$ $\,-3\,x \,-8\,y$ $\,-3\,x +\,10\,y$