$0.13+0.77+45$
$2\left(7x^2+b-1\right)$
$2\left(-4\right)\left(-1\right)\left(2\right)$
$\left(3x-5\right)^2\:=\:19$
$\left(3xy^3+9z^2\right)^2$
$\sin^2\:x\:+\cos^2\:xsin\:2\:x+cos\:2\:x$
$\left(x+1\right)\frac{dy}{dx}-y=\ln\left(x\right)$
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