$x ^ { 3 } - 3 x + 2$
$\left(\left(3y-3x\right)^4\right)\cdot x^4$
$\frac{d}{dx}x^2-3xy+y^2-2x+y-5=0$
$8\cdot50$
$x^3\:+\:x^2-x\:-1$
$\cos^4b-\sin^4b=\cos2b$
$\lim_{x\to0}\left(\frac{\log\left(x+\cos\left(x\right)\right)}{\sin\left(x\right)^3}\right)$
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