$\left(7x^2y+5x\right)^2$
$y^2+2y+5=0$
$\frac{dy}{dx}-\tan\left(x\right)y\:=\sin\left(x\right)\cos\left(x\right)$
$a\:-\:\left(-3\right)=\:9$
$-27\:+\:66\:-\left(-10\right)$
$7.2^3\:-\:3.2^2\:-\:2\:+10$
$\left(4x+5\right)\left(9x-1\right)$
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