$\left(-2i+1\right)^3$
$10\sin x=5$
$2x+5x^2=0$
$\lim_{x\to\infty}\left(\sqrt{x^2+11x}-\sqrt{x^2+17x}\right)$
$30x^4-12x^3+6x^2$
$-0.447+\frac{39}{46}$
$\lim_{x\to\infty}\left(\frac{\left(cos\left(x\right)+3\right)}{\left(x+sin\left(x\right)\right)}\right)$
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