Edited by phoipha11sbt, 01-03-2013 - 20:46.
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Posted 01-03-2013 - 20:07
phoipha11sbt
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\begin{cases} 7^{1+x-y}+3^{1+x-y}+7^{1-x+y}+3^{1-x+y}=10^{1+x-y}+10^{1-x+y} \\ 4x^2+\sqrt{2x+3}=8y+1 \end{cases}
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