$\lim_{x\to3}\left(\frac{x^2-25}{10-2x}\right)$
$4\sin^2+5\cos^2$
$\frac{x^3}{x-3}$
$14-5\cdot9$
$\lim_{x\to0}\left(\frac{2x+5tan\left(x\right)}{4\sin\left(x\right)-3x}\right)$
$-x^2-3x+14$
$x+y+z\cdot x-z-y$
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