$0,04+0,2$
$\:\left(a-1\right)\left(a+1\right)$
$\left(x+4\right)^2=6\left(y-3\right)$
$csc^2x-cot\:x-3=\:\left(cot\:x-2\right)\left(cot\:x+1\right)$
$\left(x-4ax\right)\left(x+4ax\right)$
$x-6+3x<30$
$\int f^2\cdot\ln\left(f\right)df$
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