$-5=25$
$\left\{\sin\left(x\right)\cdot\sin\left(y\right)=\frac{1}{4};\cos\left(x\right)\cdot\cos\left(y\right)=\frac{3}{4}\right\}$
$y=\frac{6x^2-2x+6}{x^3}$
$f\left(x\right)=2sen\left(x-\frac{3\pi\:}{4}\right)-3$
$\int_0^6\left(3x-7\right)\left(2x+1\right)dx$
$6\left(x+12\right)$
$4a^6-1$
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