$\lim_{x\to0}\left(\frac{\cos\left(2x\right)-1}{sin2x}\right)$
$2x^2-8x-3x+52$
$\left(\frac{3}{8}m^4-\frac{2}{7}n^5\right)^3$
$\left(-10\right)+\left(-6\right)+\left(-3\right)+\left(4\right)+\left(10\right)+\left(14\right)+\left(17\right)+\left(16\right)+\left(11\right)+\left(6\right)+\left(-3\right)+\left(-8\right)$
$\left(csc^2a-1\right)\left(csc^2a+1\right)=cot^4a+2cot^2a$
$15^4$
$\left(3b^7a\right)\left(2a^2b^{-5}\right)$
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