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

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

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

$\,13\,x +\,4\,y +\,2$ $\,-3\,x \,-4\,y +\,2$ $\,3\,x +\,4\,y \,-2$ $\,-3\,x +\,4\,y +\,2$ $\,13\,x \,-4\,y \,-2$

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

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

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

$\,16\,\,x^2 +\,x$ $\,-16\,\,x^2 +\,x$ $\,-2\,\,x^2 +\,5\,x$ $\,-16\,\,x^2 +\,5\,x$ $\,-2\,\,x^2 +\,x$

$\,1 + ( - \,5\,x + \,8) - ( \,1 - \,3\,x) =$ ?

$\,-8\,x +\,8$ $\,-2\,x +\,10$ $\,-2\,x \,-8$ $\,-2\,x +\,8$ $\,5\,x +\,1$

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

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