√(1/7)+√28-√700
=√(7/7²)+√(2²×7)-√(10²×7)
=(√7)/7+2√7-10√7
=(1/7+2-10)×√7
=(-55/7)×√7
=-55√7/7
√32-3√(1/2)+√2
=√(4²×2)-3√(2/2²)+√2
=4√2-3√2/2+√2
=(4-3/2+1)×√2
=(7/2)×√2
=7√2/2