$\left(\sec\:\left(x\right)+1\right)\left(\sec\:\left(x\right)-1\right)-\tan\:^2\left(x\right)$
$c^2+2c+1$
$3,78\:+\:0,3$
$4x^2-36x+6$
$\log\:_n\left(4\sqrt{2}\right)=10$
$x^2+25x+40$
$\log_{\frac{1}{5}}\left(x^2+1\right)^2=-2$
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