$\int_{-\pi}^{\pi}\left(\sin\left(x\right)\cos\left(2x\right)\right)dx$

$\lim_{x\to1}\left(\frac{\sqrt[3]{x}-\sqrt{x}}{\sqrt{x}-\sqrt[6]{x}}\right)$

$5-x<2x+5$

$\int\frac{\left(\sqrt{x^2+3}\right)}{x}dx$

$-5x\left(2-3x^2-5x\right)$

$6^2+6\cdot5+5^2$

$\left(2ab+1\right)\left(2ab-1\right)$