2√12+3√48
=4√3+12√3
=16√3
√七分之一+√28-√700
=(1/7)√7+2√7-10√7
=(1/7-8)√7
=(-55/7)√7
√32-3√二分之一+√2
=4√2-(3/2)√2+√2
=(3-3/2)√2
=(3/2)√2