$\int_{\frac{y}{2}}^y\frac{y}{x^2+y^2}dx$

$\left(4x+5\right)\left(2x-1\right)$

$\int\left(t+\pi\right)\cdot\cos\left(n\cdot t\right)dt$

$y-3\le6$

$4^{-2x+5}=64$

$\left(4m^2+mn+3n^2\right)\left(4m^2+mn+3n^2\right)$

$y=\ln\left(\sqrt{\frac{1+\sin\left(5x\right)}{1-\sin\left(5x\right)}}\right)$