Use order of operations to simplify 6 squared - (5 -4) + 2( 8 - 2 squared) divided by 8

Can someone me do math because i am having a breakdown rn because i don’t get it

Consider a cube that has sides of length l. now consider putting the largest sphere you can inside this cube without any point on the sphere lying outside of the cube. the volume ratio -volume of the sphere/ volume of the cube is 1. 5.2 × 10−1 2. 3.8 × 10−1 3. 1.9 4. 2.5 × 10−1 5. 3.8

Me find the value of x each figure.