$2\cos\left(2x\right)=2\sin\left(2x\right)$
$y = ( 4 x ) ^ { 3 x - 1 }$
$\sin\left(4\pi x\right)=0$
$2x^3\cdot5x^2$
$x^2+14x+5=0$
$3x^2-7x-20$
$\sec\left(a\right)-\left(\sec\left(a\right)\right)\sin2\left(a\right)$
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