$\:7x\:+\:2y\:+\:5\:-\:5x\:+\:9y\:-\:1\:$

$2\sin\left(0.4\pi t\right)\cos\left(2\pi t\right)$

$415.265-266.865$

$x-4,1\ge0$

$\sec\left(x\right)\cdot\cos\left(x\right)+1$

$\int\left(\frac{1}{\sqrt{x}\left(1+\sqrt[3]{x}\right)^2}\right)dx$

$12-\left(24-\left(-12\right)\right)+\left(\left(-8\right)+18\right)-6$