1.原式=(2√3)2+(3√2)2-2×2√3×3√2
=12+18-12√6
=30-12√6
2.原式=(2√6)2-(3√5)2=24-45=-21
3.原式=2-2√3+1-3=-2√3
4.原式=2√3×2√2+2√3×√3-3√2×2√2-3√2×√3
=√96+6-12-√54
=-6+4√6-3√6
=-6+√6
1.原式=(2√3)2+(3√2)2-2×2√3×3√2
=12+18-12√6
=30-12√6
2.原式=(2√6)2-(3√5)2=24-45=-21
3.原式=2-2√3+1-3=-2√3
4.原式=2√3×2√2+2√3×√3-3√2×2√2-3√2×√3
=√96+6-12-√54
=-6+4√6-3√6
=-6+√6