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

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

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

$\,14\,x +\,3\,y$ $\,14\,x +\,11\,y$ $\,-4\,x +\,11\,y$ $\,-4\,x +\,3\,y$ $\,-4\,x \,-3\,y$

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

$\,13\,\,x^2 \,-5\,x$ $\,-3\,\,x^2 +\,11\,x$ $\,-3\,\,x^2 \,-5\,x$ $\,-13\,\,x^2 +\,11\,x$ $\,-13\,\,x^2 \,-5\,x$

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

$\,-\,x +\,y \,-5$ $\,5\,x +\,y +\,5$ $\,x \,-\,y +\,5$ $\,x +\,y +\,5$ $\,5\,x \,-\,y \,-5$

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

$\,-9\,x +\,9$ $\,x \,-3$ $\,x +\,9$ $\,x +\,21$

$\,6\,x - ( - \,7\,\,x^2 - \,5 ) + \,9\,x=$ ?

$\,-7\,\,x^2 +\,15\,x +\,5$ $\,7\,\,x^2 \,-3\,x +\,5$ $\,-7\,\,x^2 +\,15\,x \,-5$ $\,7\,\,x^2 +\,15\,x \,-5$ $\,7\,\,x^2 +\,15\,x +\,5$