$x^4+y^4=-1$
$20-\left(12-10\right)$
$3\left(\sin\:^2\left(x\right)+\cot\:^2\left(x\right)\right)\left(\csc\:\left(x\right)+\sin\:\left(x\right)\right)$
$\frac{5}{9}ab^3-2a^3b-1b^3a+8a^3b$
$\frac{dx}{y}+\left(x^2-4x\right)dy=0$
$8^2\left(\left(-3\cdot8\right)+\left(-3\cdot8\right)\right)+9$
$\left(1+\tan\left(x\right)\right)\cdot\left(1-\tan\left(x\right)\right)+\sec^2\left(x\right)=2$
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