$\lim_{x\to9}\left(2\sqrt{x-3}\right)$
$w^2-7w+9$
$\left(-8x^5-6x^2-3\right)-\left(4x^2+2\right)$
$-9-\left(-10+\left(15-25\right)\right)$
$\cos\left(2x\right)=3-5\sin$
$x^2-4x-5y+9=0$
$\frac{-72a^5b^2d-24a^3b^3-48ab^5}{-9a^7b^3}$
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