$\lim_{x\to0}\left(3^x-e^x\right)^x$
$\int a\cos\left(bx+c\right)dx$
$2a\sqrt[4]{8ab^3}$
$3,3-4,7$
$x+4\ge45$
$\frac{-4x^3+7x^2+12x+9}{x-3}$
$-\frac{\csc\left(x\right)}{\sin\left(x\right)}+\frac{\cot\left(x\right)}{\tan\left(x\right)}=-1$
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