$\left(8x^2-5x+6\right)\left(-8x^2+5x+6\right)$

$\frac{\left(x+3\right)+\left(x+1\right)}{\left(x+1\right)\left(x-1\right)}$

$\frac{4x^2-3x-7}{2x-1}$

$\frac{dy}{dx}=-\frac{\left(2y\right)}{5\left(x+5\right)}$

$\int_0^{\frac{\pi}{6}}\left(sin^46x\right)dx$

$4x^2-5x+5\cdot3$

$\int\left(\sqrt[2]{64-x^2}\right)dx$