Question

Four times y to the fourth power

Answer 1

(x 2 y) 4 = x2*4 y 1*4  = x 8 y4 

Answer 2

$4{ y }^{ 4 }\\ \\ ={ y }^{ 4 }+{ y }^{ 4 }+{ y }^{ 4 }+{ y }^{ 4 }\\ \\ =4\left( y\cdot y\cdot y\cdot y \right)$