$15+9-5\cdot2-6\cdot4\cdot3+5-4\cdot3-4$

$1-2sin^2\left(\frac{\pi}{11}\right)$

$-15-12-23+4-8$

$\frac{dy}{dx}=\frac{1}{2400}\left(-x^2+600x\right)$

$\frac{4\sin^{2}\theta}{\sin2\theta}$

$\int_{-2}^{4w}x^2\left(x^3+8\right)dx$

$\lim_{x\to\infty}\left(x^{\frac{1}{4}}sen\frac{1}{\sqrt{x}}\right)$