$\int e^{-st}\cdot sin\left(at\right)dt$
$3-3cosx-sin^2x$
$\frac{tan^2\left(x\right)}{\sec^2\left(x\right)-1}$
$25x^2+x+9$
$a+a^2+9a$
$\lim_{x\to\infty}\left(\frac{\sqrt{25t^2-125}}{t-5}\right)$
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