$\,2\;(\,5+\,7\,t) = $   ?

$\,10 +\,7\,t$ $\,7 +\,9\,\,t$ $\,10 +\,14\,\,t$ $\,10 \,-14\,\,t$ $\,10 \,-7\,\,t$ $\,-10 +\,9\,\,t$

$(\,9\,-5\,x)\,\times\,\,2 = $   ?

$\,18 \,-10\,\,x$ $\,18 +\,5\,\,x$ $\,18 +\,10\,\,x$ $\,11 \,-3\,\,x$ $\,18 \,-3\,x$ $\,18 \,-5\,x$

$(\,3\,-7\,x)\,\times\,(\,-2\,y\,) = $   ?

$\,-6\,\,y \,-7\,x$ $\,6\,\,y \,-9\,x$ $\,\,y \,-9\,\,x\,y$ $\,-6\,\,y +\,14\,\,x\,y$ $\,-6 +\,14\,\,x\,y$ $\,-6\,\,y \,-14\,x$

$\,3\,b\;(\,-9+\,b) = $   ?

$\,-6\,\,b +\,4\,\,b^2$ $\,-27\,\,b +\,3\,\,b^2$ $\,27\,\,b +\,3\,b$ $\,-27\,\,b +\,4\,\,b^2$ $\,-27\,\,b \,-3\,b$ $\,-27\,\,b +\,b$

$(\,-9\,-7\,t)\,\times\,\,4\,t = $   ?

$\,-36\,\,t \,-7\,t$ $\,36 \,-28\,\,t^2$ $\,-5\,\,t \,-3\,\,t^2$ $\,-36\,\,t \,-3\,t$ $\,-36\,\,t \,-28\,\,t^2$ $\,-36\,\,t +\,28\,t$

$\,5\,x\;(\,x\,-7\,y) = $   ?

$\,5\,\,x^2 +\,35\,y$ $\,5\,\,x^2 \,-7\,y$ $\,5\,\,x^2 \,-35\,\,x\,y$ $\,5\,\,x^2 \,-2\,y$ $\,6\,\,x^2 \,-2\,\,x\,y$ $\,-5\,\,x^2 \,-35\,y$

$\,4\,t\;(\,-9\,t+\,4\,x) = $   ?

$\,-5\,\,t^2 +\,8\,\,t\,x$ $\,-36\,\,t^2 \,-16\,x$ $\,-36\,\,t^2 +\,16\,\,t\,x$ $\,-36\,t +\,16\,\,t\,x$ $\,-36\,\,t^2 +\,4\,x$ $\,36\,\,t^2 +\,8\,\,t\,x$

$\,-3\;(\,-9\,b\,-4) = $   ?

$\,-27\,\,b \,-7$ $\,27\,\,b \,-12$ $\,-12\,\,b \,-7$ $\,27\,\,b +\,12$ $\,27\,\,b \,-4$ $\,27\,\,b +\,4$

$(\,-7+\,8\,y)\,\times\,\,2\,x = $   ?

$\,-5\,\,x +\,10\,\,x\,y$ $\,14\,\,x +\,16\,y$ $\,-14\,\,x +\,10\,\,x\,y$ $\,-14\,\,x +\,16\,\,x\,y$ $\,-14\,\,x \,-16\,y$ $\,-14\,\,x +\,8\,y$

$\,5\;(\,-5\,a+\,9\,b) = $   ?

$\,-25\,\,a \,-45\,\,b$ $\,-25\,\,a +\,14\,\,b$ $\,-25\,\,a \,-9\,\,b$ $\,-25\,\,a +\,9\,b$ $\,-25\,\,a +\,45\,\,b$ $\,0\,\,a +\,14\,\,b$