$\int\left(x+3\right)cos\left(x^2+6x-6\right)dx$

$\lim_{x\to\infty}\left(\frac{cos\left(12x\right)}{12x}\right)$

$2^3+1$

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

$\left(-12\right)+\left(+20\right)+\left(-33\right)+\left(-4\right)+\left(+14\right)-\left(-19\right)$

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

$8a^2-6a$