$-30k^2-44k-147$
$x^2-8x+11\le0$
$-10x^2+28x-34$
$10n^2-n-2$
$\left(1+\cos\left(a\right)\right)\left(1-\cos\left(a\right)\right)=\frac{1}{1+\cot^2\left(a\right)}$
$\left(1-2b\right)^5$
$\left(\frac{7^2x^2y}{y^2}\right)^{-2}$
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