$\frac{d}{dz}\frac{\sqrt{z}}{2^z}$
$8\int\cos\left(x\right)^2dx$
$\int2x\cdot sen\left(9x-5\right)dx$
$-.03x^2+.75x+1.5125$
$-x^2+x+12<\:0$
$\left(2-b\right)^5$
$\:2x+1<3$
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