$\lim_{x\to2}\left|\left(x^2+x\right)\ln\left(x+1\right)\right|$
$\frac{\sin^{2}x}{1+\cos x}$
$\:x^2y-8xy+16y^2$
$\int\left(\frac{\sqrt{9\cdot x^2+16}}{x^4}\right)$
$2z+12$
$\left(2y+14x\right)\cdot2$
$-4x+5y;\:x=2\:;\:y=4$
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