$\int\left(\frac{x-1}{x\left(x^2+4\right)^2}\right)dx$

$x-\frac{2-x}{5}\le\frac{4x+1}{3}-\frac{x-5}{15}$

$17x+13+32-2x$

$\left(7a-4b\right)\left(2a+b\right)$

$\sqrt{45a^7}x^4y^{10}$

$y^3\frac{d^2y}{dx^2}+\frac{4}{25}=0$

$\lim_{x\to-\infty}\left(\frac{x\sqrt{\left(x+3\right)\left(x-3\right)}}{\left(x+3\right)\left(x-3\right)}\right)$