$3y+4x^{2}-3x^{2}-2y+x^{2}+2y-3x^{3}$
$3+\frac{1}{1-\frac{1}{2}}$
$3xy+6z+10-\left(9-9yx-10z\right)$
$\left(2^x-4\right)\cdot\:\left(2^x-5\right)=0$
$2\cos^2\left(x\right)+5cos\left(x\right)-12=0$
$9\:cos^2\:\left(x\right)+81$
$\frac{1}{1-x^3^3}$
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