$\lim_{x\to\frac{\pi}{2}}\left(\frac{3sec\left(x\right)}{2+tanx}\right)$
$\lim_{x\to0}\left(\frac{3ln\left(x\right)}{-8cot\left(x\right)}\right)$
$\int e^{8x}\cdot\cos\left(9x\right)dx$
$1-81x^2$
$2x^9+4x^5+2x$
$x^4-4^2$
$-\left(-10\right)-70$
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