$\int_0^{\frac{\pi}{3}}12\left(x^2+2\right)\left(sen\:\left(2x^3+12x\right)\right)dx$

$16ab^3-43ab^3$

$-\left(9-4+5\right)-\left(-3+11\right)$

$\left(-1\right)\cdot\left(-1\right)\cdot\left(-1\right)\cdot\left(1\right)\cdot\left(-1\right)\cdot\left(-1\right)\cdot\left(-1\right)$

$\int\frac{\sin^6x}{\cos^8x}dx$

$2x-5\le6x-4$

$\lim_{x\to0}\left(\frac{x^2}{x+2}\right)$