$\cot\left(x\right)=\left(\sec\left(x\right)-\tan\left(x\right)\right)\left(\csc\left(x\right)+1\right)$
$\:2k^2\:+\:5k\:+\:2$
$\frac{y^{-7}}{y^{-13}}$
$\left(x+y^7\right)^7$
$3x-14<-5$
$f\left(x\right)=e^{2x-5}+4x$
$-4k+4=40$
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