$\lim_{x\to0}\left(\frac{\sin^{-1}x}{\sin x}\right)$
$6x^2-8x-8\:\cdot2x\:-4$
$x+5=x+3$
$\left(5x^3+6x^2+x-5\right)\cdot\left(5x^2-4x+1\right)$
$11y\:+\:y$
$2z^2-38=0$
$8b-12a^4b^3-6a^5b^2+10a$
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