# Simplify (1/4z^2-1/5z)-(-3/20z^2+1/10z-13/20)

Simplify each term.
Combine and .
Combine and .
Simplify each term.
Combine and .
Move to the left of .
Combine and .
Apply the distributive property.
Simplify.
Multiply .
Multiply by .
Multiply by .
Multiply .
Multiply by .
Multiply by .
To write as a fraction with a common denominator, multiply by .
Write each expression with a common denominator of , by multiplying each by an appropriate factor of .
Multiply and .
Multiply by .
Combine the numerators over the common denominator.
Reorder and .
Cancel the common factor of and .
Factor out of .
Cancel the common factors.
Factor out of .
Cancel the common factor.
Rewrite the expression.
To write as a fraction with a common denominator, multiply by .
Write each expression with a common denominator of , by multiplying each by an appropriate factor of .
Multiply and .
Multiply by .
Combine the numerators over the common denominator.
Find the common denominator.
Multiply by .
Combine.
Multiply by .
Combine.
Reorder the factors of .
Multiply by .
Reorder the factors of .
Multiply by .
Combine the numerators over the common denominator.
Simplify the numerator.
Multiply by .
Multiply by .
Subtract from .
Multiply by .
Simplify (1/4z^2-1/5z)-(-3/20z^2+1/10z-13/20)

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