$\left(bx+5y\right)\left(3x-by\right)$

$x+5>3$

$\int\left(9x^4-7\right)^2dx$

$\left(\frac{5}{3}a^{26x-13y}+\frac{4}{9}a^{28y-14x}\right)^3$

$-a^2bc+c^4-6a^2bc^3+5c^4-6c^4$

$x^6ye^{y^2}\frac{dy}{dx}=1$

$\lim_{x\to\frac{\pi}{4}}\left(\frac{\cos\left(x\right)^2}{1-\sin\left(2x\right)}\right)$