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Have you seen anything like this before? 

What do you understand by this equation? 

How do you expand brackets? Grid/smiles and eyebrows 

How confident are you with factors and times ...

(x+2)^2=4=>x+2=2+>x=0 or x+2=-2=>x=-4

Unlike if we had just x in the numerature, here the chain rule will do us no good.  Integration by parts in this case also is little help - we end up with expressions at least as difficult as we started w...

Respiration is a chemical reaction which takes place in living cells. It uses oxygen from the air and glucose from food to release energy to allow our body to function. Carbon dioxide and water are also m...

It's not that Oxbridge doesn't care about extra-curriculars per se, but that they focus more on your academic interests and your passion for the course you're applying for. What they like to see is eviden...