$\,9\,x - ( - \,7\,\,x^2 - \,5 ) + \,4\,x=$ ?

$\,-7\,\,x^2 +\,13\,x \,-5$ $\,7\,\,x^2 +\,13\,x \,-5$ $\,7\,\,x^2 +\,13\,x +\,5$ $\,-7\,\,x^2 +\,13\,x +\,5$ $\,7\,\,x^2 +\,5\,x +\,5$

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

$\,-3\,x +\,10$ $\,x +\,10$ $\,x \,-2$ $\,3\,x +\,8$ $\,x +\,18$

$ \,\,x^2 - ( \,9 + \,7\,\,x^2 + \,3\,x)=$ ?

$\,-6\,\,x^2 \,-3\,x \,-9$ $\,-6\,\,x^2 +\,3\,x \,-9$ $\,8\,\,x^2 \,-3\,x \,-9$ $\,-6\,\,x^2 +\,3\,x +\,9$ $\,8\,\,x^2 +\,3\,x +\,9$

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

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

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

$\,6\,x \,-2\,y$ $\,6\,x +\,12\,y$ $\,6\,x +\,2\,y$ $\,12\,x +\,2\,y$ $\,12\,x +\,12\,y$

$ \,x - \,3\,\,x^2 - ( - \,5\,\,x^2 + \,7\,x )=$ ?

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