(5√3+√50)(5-√24)/√75-5√2.

(5√3+√50)(5-√24)/√75-5√2 = (5√3+√25*2)(5-√6*4)/√25*3-5√2= (5√3+5√2)(5-2√6)/5√3-5√2 = (5√3*5 + (-2√6)*5√3+5√2*5-2√6*5√2) /5√3-5√2 = (10√3 - 10 √18+25 √2 )