$5x-8ysqrt\left(x^2+1\right)\frac{dy}{dx}=0$
$\left(4w^3-5y^2+3\right)-\left(2y^2-3w^3-2\right)$
$-25\:\left[\:6\:+\:\left(-4\right)\right]\:$
$\left(-5x^2-x+4\right)+\left(-3x^2+5x+2\right)$
$108\cdot92$
$3xy^2+5y-y^3$
$cot\:x.\:cos\:x.\:sen\:x=sen^2$
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