$\left(5-3\left(-2\right)\right)\left(-\left(-4\right)+4\right)$
$\lim_{x\to0}\left(\frac{e^x-e^{-x}-2\sin x}{x^2}\right)$
$4\:x\:9,1$
$\int\sqrt{7u-5}du$
$x^2+54x+729$
$\int\left(12x-8\right)\left(3x^2-4x-1\right)^4dx$
$\frac{2}{x\left(x+9\right)}$
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