zapisz w jak najprostszej postaci:
30a²b²/5 * 2b-(3a+a*2ab²)=
x²y-(3x*yx+2y²x)+15x²y²/3x =
12m²n²/4mn⁵+21mn/6m⁴n² *2m⁵n-½m=
3u³v-3vu*5u²+(3u²v*2u-vu³)/4uv=