(x+yx)dx−dy=0\left(x+\frac{y}{x}\right)dx-dy=0(x+xy)dx−dy=0
∫ 6x(x2 + 1)3dx\int\:6x\left(x^2\:+\:1\right)^3dx∫6x(x2+1)3dx
+9−5+11−12+14+9-5+11-12+14+9−5+11−12+14
x2+8x≥−7x^2+8x\ge-7x2+8x≥−7
sin(3x)−sin(7x)cos(3x)+cos(7x)=−tan(2x)\frac{sin\left(3x\right)-sin\left(7x\right)}{cos\left(3x\right)+cos\left(7x\right)}=-tan\left(2x\right)cos(3x)+cos(7x)sin(3x)−sin(7x)=−tan(2x)
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