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

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

$ \,7\,x + \,5\,y - ( \,8\,x - \,3\,y)=$ ?

$\,-\,x +\,8\,y$ $\,-\,x \,-2\,y$ $\,15\,x +\,2\,y$ $\,-\,x +\,2\,y$ $\,15\,x +\,8\,y$

$ \,3\,\,x^2 - ( \,8 + \,4\,\,x^2 + \,6\,x)=$ ?

$\,-\,\,x^2 +\,6\,x \,-8$ $\,-\,\,x^2 +\,6\,x +\,8$ $\,7\,\,x^2 \,-6\,x \,-8$ $\,-\,\,x^2 \,-6\,x \,-8$ $\,7\,\,x^2 +\,6\,x +\,8$

$\,4\,x + (\,7 - \,5\,x + \,3\,y) =$ ?

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

$\,5\,x - ( - \,5\,\,x^2 - \,3 ) + \,8\,x=$ ?

$\,-5\,\,x^2 +\,13\,x +\,3$ $\,5\,\,x^2 +\,13\,x +\,3$ $\,-5\,\,x^2 +\,13\,x \,-3$ $\,5\,\,x^2 +\,13\,x \,-3$ $\,5\,\,x^2 \,-3\,x +\,3$

$\,6 + ( - \,4\,x + \,5) - ( \,7 - \,9\,x) =$ ?

$\,-13\,x +\,4$ $\,3\,x +\,6$ $\,5\,x +\,18$ $\,5\,x +\,4$ $\,5\,x \,-6$