$ \,2\,\,x^2 - ( \,5 + \,8\,\,x^2 + \,7\,x)=$ ?

$\,-6\,\,x^2 +\,7\,x +\,5$ $\,-6\,\,x^2 +\,7\,x \,-5$ $\,10\,\,x^2 \,-7\,x \,-5$ $\,-6\,\,x^2 \,-7\,x \,-5$ $\,10\,\,x^2 +\,7\,x +\,5$

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

$\,-7\,\,x^2 +\,2\,x$ $\,-5\,\,x^2 +\,14\,x$ $\,-7\,\,x^2 +\,14\,x$ $\,-5\,\,x^2 +\,2\,x$ $\,7\,\,x^2 +\,2\,x$

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

$\,8\,\,x^2 +\,7\,x +\,5$ $\,8\,\,x^2 +\,3\,x +\,5$ $\,-8\,\,x^2 +\,7\,x +\,5$ $\,8\,\,x^2 +\,7\,x \,-5$ $\,-8\,\,x^2 +\,7\,x \,-5$

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

$\,3\,x +\,7\,y +\,4$ $\,5\,x +\,7\,y +\,4$ $\,-3\,x +\,7\,y \,-4$ $\,3\,x \,-7\,y +\,4$ $\,5\,x \,-7\,y \,-4$

$\,4 + ( - \,5\,x + \,6) - ( \,5 - \,4\,x) =$ ?

$\,-\,x +\,15$ $\,-\,x \,-7$ $\,-\,x +\,5$ $\,-9\,x +\,5$

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

$\,-3\,x +\,4\,y$ $\,-3\,x +\,2\,y$ $\,-3\,x \,-2\,y$ $\,5\,x \,-2\,y$ $\,5\,x +\,4\,y$