Please help urgent due in 30 minutes

X/y + 4y/x divided by x/y - 2y/x explain as in depth as you can how you simplfied the fractions. i don't know where to start on this : /

Find the length of the radius of a circle with the center at -7+2i and a point in the circle at 33+11i

X² + 4y² = 36 the major axis runs along: a) y=4x b) x-axis c) y-axis