$-\frac{3}{4}a^2+\frac{3}{2}ab+\frac{5}{6}b^2+\frac{7}{3}a^2-\frac{3}{4}ab-2ab$
$\left(x^3y-11\right)^3$
$2\left(\csc\left(2x\right)\right)-\tan\left(x\right)=\cot\left(x\right)$
$\frac{x^5-20x^3}{32}$
$10^5\:.1000:0'0001$
$4\left(c+4\right)$
$-21\left(-10\right)$
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