$\frac{d}{dx}y^3+x^2y=9$

$\frac{3x}{4x+5}-\frac{6x}{8x+5}$

$z^2-126z-769$

$\lim_{x\to\infty}\left(\frac{x+\sin\left(x\right)}{3x+\cos\left(x\right)}\right)$

$\sec\left(x\right)\left(1-\sin^2\left(x\right)\right)=\frac{\cos\left(x\right)}{\sin\left(x\right)+1}$

$\ln\left(x+11\right)-\ln\left(12-2x\right)=3\ln\left(2\right)$

$\left(3-m\right)^2$