−6f2+3−f-6f^2+3-f−6f2+3−f
2x2+3x=1892x^2+3x=1892x2+3x=189
limx→−3(x+2x2+7x+12)\lim_{x\to-3}\left(\frac{x+2}{x^2+7x+12}\right)x→−3lim(x2+7x+12x+2)
3x4−5x2+23+x3\frac { 3 x ^ { 4 } - 5 x ^ { 2 } + 2 } { 3 + x ^ { 3 } }3+x33x4−5x2+2
4x2 + 28x + 494x^2\:+\:\:28x\:+\:494x2+28x+49
12⋅3+18:(−2+8)12 \cdot 3 + 18 : ( - 2 + 8 )12⋅3+18:(−2+8)
12=−6x12=-6x12=−6x
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