$sin^2x\cdot\left(2sin\left(2x\right)\right)-2sinxcosx\left(1-cos\left(2x\right)\right)=0$
$\left(3x^2+5y^3\right)\left(2x^2-y^3\right)$
$\lim_{x\to0}\left(\frac{\left(1-e^x\right)\cdot\left(1-\cos\left(x\right)\right)}{x^3+x^4}\right)$
$\sin\left(x\right)=\frac{\sqrt{3}}{4}$
$5+8.6$
$42.\left(-2\right)-\left(-7+16\right).\left(-12\right)-\left(-55\right)$
$\frac{\left(2x-6\right)}{x^2-1}$
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