perform the indicated operations(please answer it huhu)

Answer:
addition:
1.) 5x⁴-6x³-7x²-3
2.) -3x³y-4x²y²-1
3.) 10 + 18y³
4.) -11x^5 -4x³-10x²+8x+2
5.) 5y^5 + y⁴+5y³-2y+14
subtraction:
6.) -3x³-9x²+3
7.) -3x²y-12xy+9y²
8.) 15x^5 -13x³+5x²
9.) -4x³+6x²+2x+16
10.) 0.5y³+6.5y²+12 -2y
Step-by-step explanation:
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