Question: Using magnetoencephalography adults brains were found to react differently to babies as quickly as 100200 milliseconds after hearing the sound
Please fix the punctuation.
Fixed: [Using magnetoencephalography adults' brains were found to react differently to babies as quickly as 100-200 milliseconds after hearing the sound.]

Question: But remember the first key is to start looking
Please fix the punctuation.
Fixed: [But remember: the first key is to start looking.]

Question: Freedom for imagination is unlimited
Please fix the punctuation.
Fixed: [Freedom for imagination is unlimited.]

Question: Multi Color Crystal Set Necklace and Matched Earrings
Please fix the punctuation.
Fixed:
[Multi Color Crystal Set ( Necklace and Matched Earrings )]