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

$\,13\,\,x^2 +\,9\,x \,-13$ $\,5\,\,x^2 +\,9\,x \,-13$ $\,22\,\,x^2 \,-13$ $\,-13\,\,x^2 +\,9\,x +\,13$ $\,-5\,\,x^2 +\,9\,x +\,5$

$\,-\,x +\,2 +\,9\,x \,-7 +\,6\,x=$ ?

$\,2\,x \,-5$ $\,14\,x \,-9$ $\,23\,x$ $\,9\,x$ $\,14\,x \,-5$ $\,-4\,x \,-9$

$\,x +\,9 \,-7\,x =$ ?

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

$\,y \times \,2\,x \,-7\,xy =$ ?

$\,9\,xy$ $\,y +\,2\,x \,-7\,xy$ $\,-4\,xy$ $\,-5\,xy$ $\,-9\,xy$

$\,1\times \,x \times (\,-7\,) + \,x \times \,4\,x =$ ?

$\,4\,\,x^2 \,-7\,x$ $\,4\,\,x^2 \,-6\,x$ $\,-3\,\,x^2$ $\,-4\,\,x^2 \,-7\,x$ $\,4\,\,x^2 +\,7\,x$

$\,-3 \,-6\,x +\,3\,y +\,x +\,5=$ ?

$\,-8\,x +\,3\,y +\,5$ $\,-2\,xy +\,2$ $\,-5\,x +\,3\,y +\,2$ $\,-5\,x \,-3\,y +\,2$ $\,-5\,x +\,3\,y \,-8$

$\,9\,x \,-3\,y +\,8\,y +\,6\,x=$ ?

$\,3\,x \,-11\,y$ $\,6\,xy +\,14\,yx$ $\,15\,x +\,11\,y$ $\,15\,x +\,5\,y$ $\,3\,x +\,5\,y$

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

$\,-11\,x +\,8$ $\,-28\,x +\,8$ $\,14\,x +\,6$ $\,28\,x +\,8$ $\,28\,x \,-4$