$15x+7\left(x-2\right)-2\left(1+x\right)$

$-x^2-5x-6\ge0$

$\left(\sqrt[3]{4}c^2d^3\right)\left(\sqrt{2c}d\right)^2$

$\lim_{x\to0}\left(\frac{sinx}{cosx\left(1+sinx\right)}\right)$

$12\cdot\tan^2\left(x\right)-8\sec^2\left(x\right)-\frac{3}{\cot\left(x\right)}+10$

$\int_1^{\infty}\left(\frac{1}{sqrt\left(x^2+1\right)}\right)dx$

$-x^2y+x^22y$