cos3x=−cos3xcos3x=-cos3xcos3x=−cos3x
3x2+18x−203x^2+18x-203x2+18x−20
dydt=e−3ty2\frac{dy}{dt}=\frac{e^{-3t}}{y^2}dtdy=y2e−3t
(x2−y22)\left(x^2-\frac{y^2}{2}\right)(x2−2y2)
(x−1)(z+2)\left(x-1\right)\left(z+2\right)(x−1)(z+2)
1gc+3y⋅2g1gc+3y\cdot2g1gc+3y⋅2g
da2=−gda^2=-gda2=−g
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