$\left(-24\right)-\:\left(-25\right)$
$x^2+4x=7$
$8ac\:-\:4ad\:-\:6bc\:+\:3bd$
$3ab+25ab-11ab-35+14ab$
$\frac{d}{dx}cosx.log3$
$\int te^{t^2}sin\left(e^{t^2}\right)dt$
$2a-3b;a=0,b=-2$
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