$ \,5\,x - \,9\,\,x^2 - ( - \,3\,\,x^2 + \,2\,x )=$ ?

$\,-12\,\,x^2 +\,7\,x$ $\,-6\,\,x^2 +\,7\,x$ $\,12\,\,x^2 +\,3\,x$ $\,-12\,\,x^2 +\,3\,x$ $\,-6\,\,x^2 +\,3\,x$

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

$\,-7\,x +\,12\,y$ $\,-7\,x \,-4\,y$ $\,9\,x \,-4\,y$ $\,-7\,x +\,4\,y$ $\,9\,x +\,12\,y$

$\,9 + ( - \,9\,x + \,4) - ( \,8 - \,2\,x) =$ ?

$\,-7\,x +\,5$ $\,-11\,x +\,5$ $\,-11\,x +\,9$ $\,-7\,x \,-3$ $\,-7\,x +\,21$

$ \,3\,\,x^2 - ( \,5 + \,4\,\,x^2 + \,2\,x)=$ ?

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

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

$\,-\,x \,-2\,y +\,9$ $\,3\,x \,-2\,y \,-9$ $\,x +\,2\,y \,-9$ $\,-\,x +\,2\,y +\,9$ $\,3\,x +\,2\,y +\,9$

$\,6\,x - ( - \,4\,\,x^2 - \,7 ) + \,4\,x=$ ?

$\,4\,\,x^2 +\,10\,x \,-7$ $\,-4\,\,x^2 +\,10\,x +\,7$ $\,4\,\,x^2 +\,2\,x +\,7$ $\,-4\,\,x^2 +\,10\,x \,-7$ $\,4\,\,x^2 +\,10\,x +\,7$