$3\sin\left(x\right)-4sin^3x=\frac{-\sqrt{3}}{2}$
$\left(-3\right)^3^2-120$
$3\sec\left(2x\right)\cdot\frac{dy}{dx}=1$
$-1-\sqrt{3}i$
$5+x<18$
$\int_0^{1000}\left(x^2\right)dx$
$\lim_{x\to+\infty}\left(18x^3-33x^2+20x-4\right)$
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