$\sec\left(x\right)\csc\left(x\right)+\left(\tan\left(x\right)+\cot\left(x\right)\right)=2\csc\left(x\right)\sec\left(x\right)$
$b^2-16$
$\:\left(x\:a\:+\:y\:b\:\right)\:^2$
$y'=e^{2x-1}y^2$
$5\left(2\right)^2+2\left(-1\right)\left(3\right)+3$
$\sin\left(x\right)^4-\cos\left(x\right)^4+\cos\left(2x\right)=0$
$b^2+1b+0.25$
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