$\tan2\left(36.86\right)$
$\left(10f^2b^5g^3-2b^4\right)^2$
$15x^2y^4+10x^4y^6-20x^3y^{10}$
$\left(4b\:+\:\:3c\right)^2$
$\lim_{x\to\infty}\left(\frac{sin2x}{5x}\right)$
$\lim_{x\to0}\left(x+2^{\frac{x}{4}}\right)^{\frac{4}{x}}$
$5.50-2.75$
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