Can you guys PLEASE help me? there is 50 POINTS IN THIS and this is an exam i reeaaaly need help:( im begging yall❤️

Simplify (a/b - b/a) times (a - a^2/a+b) a - a^2/a=b is a mixed number

Abird on top of a 200 ft bridge tower sees a man standing on the lower part of the bridge (which is 50 ft above the ground). the angle of depression from the bird is 26 ̊. how far is the man from the base of the bridge tower? with explanation and pictures .

Abcd is a square. what is the measure of angle bac