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Anyone here do competitive math?

Is anyone here good at math? Also, show me verification of how good you are
Mi iz gud et meths

Once teacher told me "you have 3 dollars"
Me: ok?
Teacher: now your mum gives you another 3 dollars
Me: hmmm
Teacher: so now how many you have?
Me: 3 dollars
Teacher: YOU DON'T KNOW MATHS
Me: You don't know my mum
Help my sir is asking me whats 10.008*10 hellppppp
1+1 = ? - Proving using algebra
1+1 = 1^2 + 1^2
Taking 1 as 'a' and the other 1 as 'b',
Adding and subtracting 2ab
= (a^2 + b^2 + 2ab) - 2ab
= (a+b)^2 -2ab
= 2^2 - 2*1*1
= 4 - 2
= 2
Hence Proved.
Dunno of math, but man your grammar should be improved and worked on (re-read the title if ur confused)

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