Expand the brackets and simplify the surds: Please explain your steps:
1. (5 + √3) (4 + 2√3)
2. (4√3 + - √2) (3√3 - 4√2)
3. (√2+1)²
4. √21(√3+√7)²
5. ( (√2)³ + √5)²
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Expand the brackets and simplify the surds: Please explain your steps:
1. (5 + √3) (4 + 2√3)
2. (4√3 + - √2) (3√3 - 4√2)
3. (√2+1)²
4. √21(√3+√7)²
5. ( (√2)³ + √5)²
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