11−sin2(y)=1+tan2y\frac{1}{1-sin^2\left(y\right)}=1+tan^2y1−sin2(y)1=1+tan2y
3s2−14s+83s^2-14s+83s2−14s+8
4x3−8x2−4x+84x^3-8x^2-4x+84x3−8x2−4x+8
x2−6x=−5x^2-6x=-5x2−6x=−5
1+11+x1+\frac{1}{1+x}1+1+x1
3x−7x+5x+4y3x-7x+5x+4y3x−7x+5x+4y
6x+1=x+116x+1=x+116x+1=x+11
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