$\left(4-i\right)\left(5i+1\right)$
$4+cot^2a=\csc^2a+3$
$\left(196k^4r^6\right)^{\frac{1}{2}}$
$\left(4x-3yz\right)^2$
$\lim_{x\to4}\left(\frac{\left(x-1\right)}{\sqrt{x}-1}\right)$
$\left(5c+\frac{1}{2}\right)^3$
$-3\left(r-4\right)>0$
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