$\left(4x-b\right)^4$
$5y^2-2y-3=0$
$\frac{1+cos\:2x}{sin\:2x}=\cot\left(2x\right)$
$-5y+12+8y-6-2$
$\sqrt{\:3\tan\left(z\right)\sec\left(z\right)}$
$2\left(2x+3\right)-5\left(x-1\right)=21$
$sin^2xcos^2x+sin^4x=\left(1-cos\right)\left(1+cos\right)$
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