$a^24=a^4$
$\cos\left(x\right)\sin\left(x\right)=-7\sin\left(x\right)$
$sen^2a\:\:+\:cos^2a\:\:+\:tan^2a\:=\sin^2\:a$
$b^{3x}+\sqrt{x^2}+1$
$\left(3\sqrt{7}\right)\left(5\sqrt{7}\right)$
$x^2+y^2-1=0$
$\int-4x\cdot e^{5\cdot x}$
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