$1-\tan\left(x\right)^2=\cos\left(2x\right)\sec\left(x\right)^2$
$\left(5z-4k\right)^3$
$\left(\sqrt{x}\right)^{3\sqrt{x}}$
$\left(x-3\right)^2-6x\:+\:12\:\ge\left(x+4\right)\left(x-4\right)+1$
$m^4+6m^2+25$
$8x^2-49x-120$
$cot^{\left(2\right)}xcos^{\left(2\right)}x=cot^{\left(2\right)}x-cos^{\left(2\right)}x$
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