$\frac{x^4+16}{x-2}$
$\left(z^3-8\right)+\left(z-2\right)$
$\left(\sin x+\cos x\right)^2-\left(\sin x-\cos x\right)^2=n.\sin x.\cos x$
$\lim_{x\to\infty}\frac{\sqrt{x^2+1}}{x+1}$
$-5+8z+24-17y$
$5x-8<4+2x$
$\left(x^3-2x+4\right)+\left(3x-6x^3+4x^2+2\right)+\left(9x-8x^2-3x+4\right)$
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