#(2 sqrt3 + 3 sqrt20 - (4 sqrt2 - 3 sqrt5 - 2 sqrt6)#
#=> 2 sqrt3 + 3 sqrt2 - 4 sqrt2 + 3 sqrt5 + 2 sqrt6, " Removing bracess"#
#=> 2 sqrt3 - sqrt2 + 3 sqrt 5 + 2 sqrt2 * sqrt3#
#=> (2 sqrt3 + sqrt2 * 2 sqrt3) - sqrt2 + 3 sqrt5#
#color(brown)(=> 2 sqrt3 (1 + sqrt2) - sqrt2 + 3 sqrt5)#