$2\sin^2\left(2x\right)-\cos\left(2x\right)-1=0$
$y'\:-\:y\:=2^x$
$7\cdot2+2-\left(5+6\right)$
$x+9=13$
$-6x=150$
$\frac{11}{3}z-\frac{3}{4}f+\frac{2}{3}z-\frac{1}{3}z-\frac{5}{3}z+f+\frac{1}{4}f$
$\frac{d}{dx}x^5-x^3+3$
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