−51+4-51+4−51+4
cos2v−sin4v\cos2v-\sin4vcos2v−sin4v
(7−z2)(z3−z+1)\left(7-z^2\right)\left(z^3-z+1\right)(7−z2)(z3−z+1)
sin(x)2+1sec(x)2=1\sin\left(x\right)^2+\frac{1}{\sec\left(x\right)^2}=1sin(x)2+sec(x)21=1
−3x3+20x2−36x+16-3x^3+20x^2-36x+16−3x3+20x2−36x+16
sin(y)(1+cot2(y))\sin\left(y\right)\left(1+\cot^2\left(y\right)\right)sin(y)(1+cot2(y))
(3a−4)4\left(3a-4\right)^4(3a−4)4
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