ddx(z2+6xy)(x3+5)=2\frac{d}{dx}\left(z^2+6xy\right)\sqrt{\left(x^3+5\right)}=2dxd(z2+6xy)(x3+5)=2
cos (11x)+cos (9x)cos (4x)+cos (2x)\frac{\cos\:\left(11x\right)+\cos\:\left(9x\right)}{\cos\:\left(4x\right)+\cos\:\left(2x\right)}cos(4x)+cos(2x)cos(11x)+cos(9x)
(4a2−7)(4a2+9)\left(4a^2-7\right)\left(4a^2+9\right)(4a2−7)(4a2+9)
y′ +11+x2=11+x2y'\:+\frac{1}{1+x^2}=\frac{1}{1+x^2}y′+1+x21=1+x21
limx→∞ (xe6x)\lim_{x\to\infty\:}\left(\frac{x}{e^{6x}}\right)x→∞lim(e6xx)
(15+18)2\left(\frac{1}{5}+\frac{1}{8}\right)^2(51+81)2
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