−2x+3≤−9−3x-2x+3\le-9-3x−2x+3≤−9−3x
∫(5−50x)9−25x2dx\int\frac{\left(5-50x\right)}{\sqrt{9-25x^2}}dx∫9−25x2(5−50x)dx
cos2(tan2+1)cos^2\left(tan^2+1\right)cos2(tan2+1)
2cos3x=12cos3x=12cos3x=1
−x+19x−18x-x+19x-18x−x+19x−18x
5y+67y+y5y+67y+y5y+67y+y
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