Question 303584
(5*sqrt7 - 15*sqrt2) * (2*sqrt7 + 6*sqrt2)
.
5sqrt7*2sqrt7+5sqrt7*6sqrt2 -15sqrt2*2sqrt7 -15sqrt2*6sqrt2
.
10*7 + 30sqrt7*sqrt2- 30sqrt2*sqrt7-90*2
.
70+0 -180

-110

Ananth