Which expression is equivalent to the following expression? 4(3g)+4g Which expression is equivalent to the following expression? s+s+s+s+s+s+t+t+t

Which expression is equivalent to the following expression? 9x-5y+x+x+x+x

Which expression is equivalent to the following expression? 3(3v)+5v

Which expression is equivalent to the following expression? 9k+9m-k-k-k-k