$2\sin^{2}77^{\circ}$
$\left(-3x^{3\:}-8\right)\left(3x^3-8\right)$
$\lim_{x\to\infty}\left(1-\frac{1}{x}\right)^{0.2x}$
$\int\left(\frac{ln\left(x+25\right)}{\left(x^2+25\right)^2}\right)dx$
$\left(2i-3n\right)^2$
$x^3-21x^2147x-343$
$-5\cdot1-16$
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