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Simplify each of the following surds into their simplest form: 2√15 × 3√10 = √ Simplify each of the following surds into their simplest form: 5√21 × 2√3 = √ Simplify each of the following surds into their simplest form: 5√12 × 2√75 = Simplify each of the following surds into their simplest form: 4√6 ÷ 2√3 = √ Simplify each of the following surds into their simplest form: √10 ÷ √2 = √ Simplify each of the following surds into their simplest form: 6√28 ÷ √63 = |