$5x^2-6x+3-\left(7x^2-2x+8\right)$

$2w:\:-2w$

$8+144i\cdot\sqrt{12^2}$

$\int_8^{\infty}\left(\frac{e^{\sqrt{x}}}{\sqrt{x}}\right)dx$

$3+5\cos\left(\frac{\pi}{8}\right)\cos\left(\frac{\pi}{10}\right)$

$6z^3-10z$

$\frac{2cos\left(x\right)-2sin\left(x\right)}{sin\left(2x\right)}$