$2859\sqrt{4}$

$34\cdot16$

$\frac{a^{-4}b^{-37}c^{37}d^4.abc^{-1}d^0.ab^5c^{-4}d^{-2}}{a^0b^{-7}cd}$

$\lim_{x\to\frac{\pi}{3}}\left(\sin^2\left(x\right)-\tan^2\left(x\right)\right)$

$\left(\frac{2}{3}a+3b^2\right)^2$

$2\cos^2\left(4x\right)-1$

$\frac{dy}{dx}=\frac{xy-7y}{x^3}$