$secbeta\left(1+cosbeta\right)\left(1-cosbeta\right)$

$-27-\left(-5\right)-12$

$x^2-3x+7<4x-3$

$\int e^{-5x}\sin\left(6x\right)dx$

$-8\left(\frac{1}{4}\right)+3\left(\frac{1}{3}\right)$

$\int sec^6\left(x\right)dx$

$\left|\left(-8+7\right)-\left(+2\right)\right|\cdot\left(-2\right)$