$10tanx+12=tanx+6$

$\int_{100}^{\infty}\left(x-200\right)\left(\frac{2000}{x^3}\right)dx$

$\lim_{x\to0}\left(\frac{1-a^x}{x}\right)$

$\frac{d}{dy}\left(e^{-x}\sin\left(x+y\right)\right)$

$\sqrt{14}\cdot\sqrt{8}$

$\int\sin\left(2x\right)^7\cdot\cos\left(2x\right)dx$

$\frac{64x^3-y^3}{4x+y}$