$\left(115x+35\right)\left(85x+22\right)$

$\frac{1}{\cos\left(x\right)}+tan\left(x\right)=\frac{\cos\left(x\right)}{1+\sin\left(x\right)}$

$2-8+70$

$\lim_{x\to\infty}\sqrt[2]{3x^2+5x-9}-\sqrt{3x^2-x+1}$

$x^2-16x+63$

$\frac{dy}{dx}\left(y=10^{ln3t}\right)$

$\frac{dy}{dx}=\frac{1-x^2+y^2-x^2y^2}{x^2}$