$\,5\;(\,3\,t+\,9) = $   ?

$\,15\,\,t +\,14$ $\,15\,\,t \,-45$ $\,15\,\,t \,-9$ $\,8\,\,t +\,14$ $\,15\,\,t +\,9$ $\,15\,\,t +\,45$

$\,4\;(\,6\,b\,-5) = $   ?

$\,24\,\,b +\,5$ $\,24\,\,b \,-5$ $\,24\,\,b +\,20$ $\,10\,\,b \,-1$ $\,-24\,\,b \,-1$ $\,24\,\,b \,-20$

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

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

$(\,-7\,a+\,3\,b)\,\times\,\,3 = $   ?

$\,-21\,\,a \,-3\,\,b$ $\,-21\,\,a \,-9\,\,b$ $\,-21\,\,a +\,3\,b$ $\,-4\,\,a +\,6\,\,b$ $\,-21\,\,a +\,9\,\,b$ $\,-21\,\,a +\,6\,\,b$

$\,6\,a\;(\,5\,a\,-3\,b) = $   ?

$\,30\,\,a^2 \,-18\,\,a\,b$ $\,30\,\,a^2 +\,18\,b$ $\,30\,\,a^2 \,-3\,b$ $\,11\,\,a^2 +\,3\,\,a\,b$ $\,30\,\,a^2 +\,3\,b$ $\,-30\,\,a^2 \,-18\,b$

$(\,3\,t+\,3)\,\times\,\,6\,t = $   ?

$\,18\,\,t^2 \,-18$ $\,18\,\,t^2 +\,3$ $\,9\,\,t^2 +\,9\,\,t$ $\,18\,\,t^2 +\,18\,\,t$ $\,-18\,\,t^2 +\,9\,\,t$ $\,18\,t +\,18\,\,t$

$\,6\,t\;(\,4\,t+\,9) = $   ?

$\,-24\,\,t^2 +\,15\,\,t$ $\,24\,\,t^2 \,-54$ $\,24\,\,t^2 +\,9$ $\,10\,\,t^2 +\,15\,\,t$ $\,24\,\,t^2 +\,54$ $\,24\,\,t^2 +\,54\,\,t$

$(\,6\,y+\,4\,x)\,\times\,\,6\,y = $   ?

$\,36\,\,y^2 +\,24\,\,x\,y$ $\,12\,\,y^2 +\,10\,\,x\,y$ $\,-36\,y +\,24\,\,x\,y$ $\,36\,\,y^2 +\,4\,x$ $\,36\,\,y^2 +\,10\,\,x\,y$ $\,36\,\,y^2 \,-24\,x$

$\,6\,x\;(\,-4+\,8\,y) = $   ?

$\,-24\,\,x +\,48\,\,x\,y$ $\,2\,\,x +\,14\,\,x\,y$ $\,-24\,\,x +\,48\,y$ $\,24\,\,x +\,14\,\,x\,y$ $\,-24\,\,x +\,8\,y$ $\,-24\,\,x \,-48\,y$

$\,-5\;(\,-7\,-3\,b) = $   ?

$\,35 +\,3\,\,b$ $\,35 +\,15\,\,b$ $\,-35 \,-8\,b$ $\,-12 \,-8\,\,b$ $\,35 \,-15\,\,b$ $\,35 \,-3\,b$