$9y^2-15y+1$

$\ln\left(y-9\right)-\ln\left(7\right)=\ln\left(x\right)+x$

$-5a+2a$

$\lim_{x\to0}-\left(\left(\frac{x^2}{4+x^2}\right)sin\left(\frac{1}{x}\right)\right)$

$\int\left(\frac{5}{\sqrt{x}\left(7+5\sqrt{x}\right)^7}\right)dx$

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

$y=\sqrt{\sqrt[3]{2x}}$