$2+2+4t^2$
$x^2-x+1;\:x=1$
$sin\:t=\frac{2}{3}$
$\int\left(8^{-8x}\right)dx$
$\left(x+2\right)^2-x=2x^2-\left(x-2\right)^2$
$log\left(2x+1\right)+log\left(x+2\right)=0$
$124\cdot6$
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