limx→0(ln(1+10x)15x)\lim_{x\to0}\left(\frac{ln\left(1+\frac{10}{x}\right)}{\frac{1}{5x}}\right)x→0lim(5x1ln(1+x10))
y2=10−2y+9x\frac { y } { 2 } = 10 - 2 y + 9 x2y=10−2y+9x
3.−52+5.−93.-5^2+5.-93.−52+5.−9
x4+x3+x2+xx^4+x^3+x^2+xx4+x3+x2+x
21cos(x)2\frac{1}{\cos\left(x\right)}2cos(x)1
−45x+19y+31x−53y-45x+19y+31x-53y−45x+19y+31x−53y
81m2−36281m^2-36^281m2−362
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